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Finding the Fourth Proportional to 639,276.30, 958,477.05 and 302,478.30

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Solution

The fourth proportional to 639,276.30, 958,477.05 and 302,478.30 is: 453,510.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,276.30 : 958,477.05 = 302,478.30 : x
  2. Step 2: Convert to fraction form
    639,276.30/958,477.05 = 302,478.30/x
  3. Step 3: Cross multiply
    639,276.30x = 958,477.05 × 302,478.30
  4. Step 4: Simplify right side
    639,276.30x = 289,918,508,673.02
  5. Step 5: Solve for x
    x = 289,918,508,673.02/639,276.30
  6. Step 6: Final answer
    x = 453,510.49

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Half scale
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Double scale
Find fourth proportional to 639,277.30, 958,478.55 and 302,479.30
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.