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Finding the Fourth Proportional to 636,420.24, 878,256.76 and 374,927.32

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Solution

The fourth proportional to 636,420.24, 878,256.76 and 374,927.32 is: 517,397.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,420.24 : 878,256.76 = 374,927.32 : x
  2. Step 2: Convert to fraction form
    636,420.24/878,256.76 = 374,927.32/x
  3. Step 3: Cross multiply
    636,420.24x = 878,256.76 × 374,927.32
  4. Step 4: Simplify right side
    636,420.24x = 329,282,453,298.68
  5. Step 5: Solve for x
    x = 329,282,453,298.68/636,420.24
  6. Step 6: Final answer
    x = 517,397.83

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.