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Finding the Fourth Proportional to 642,005.60, 963,008.40 and 310,229.60

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Solution

The fourth proportional to 642,005.60, 963,008.40 and 310,229.60 is: 465,344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,005.60 : 963,008.40 = 310,229.60 : x
  2. Step 2: Convert to fraction form
    642,005.60/963,008.40 = 310,229.60/x
  3. Step 3: Cross multiply
    642,005.60x = 963,008.40 × 310,229.60
  4. Step 4: Simplify right side
    642,005.60x = 298,753,710,728.64
  5. Step 5: Solve for x
    x = 298,753,710,728.64/642,005.60
  6. Step 6: Final answer
    x = 465,344.40

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Double scale
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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.