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Finding the Fourth Proportional to 642,509.60, 963,764.40 and 310,733.60

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Solution

The fourth proportional to 642,509.60, 963,764.40 and 310,733.60 is: 466,100.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,509.60 : 963,764.40 = 310,733.60 : x
  2. Step 2: Convert to fraction form
    642,509.60/963,764.40 = 310,733.60/x
  3. Step 3: Cross multiply
    642,509.60x = 963,764.40 × 310,733.60
  4. Step 4: Simplify right side
    642,509.60x = 299,473,981,563.84
  5. Step 5: Solve for x
    x = 299,473,981,563.84/642,509.60
  6. Step 6: Final answer
    x = 466,100.40

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Half scale
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Double scale
Find fourth proportional to 642,510.60, 963,765.90 and 310,734.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.