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Finding the Fourth Proportional to 647,155.84, 970,733.76 and 646,221.28

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Solution

The fourth proportional to 647,155.84, 970,733.76 and 646,221.28 is: 969,331.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,155.84 : 970,733.76 = 646,221.28 : x
  2. Step 2: Convert to fraction form
    647,155.84/970,733.76 = 646,221.28/x
  3. Step 3: Cross multiply
    647,155.84x = 970,733.76 × 646,221.28
  4. Step 4: Simplify right side
    647,155.84x = 627,308,812,926.41
  5. Step 5: Solve for x
    x = 627,308,812,926.41/647,155.84
  6. Step 6: Final answer
    x = 969,331.92

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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.