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Finding the Fourth Proportional to 636,844.62, 878,907.60 and 475,419.36

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Solution

The fourth proportional to 636,844.62, 878,907.60 and 475,419.36 is: 656,125.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,844.62 : 878,907.60 = 475,419.36 : x
  2. Step 2: Convert to fraction form
    636,844.62/878,907.60 = 475,419.36/x
  3. Step 3: Cross multiply
    636,844.62x = 878,907.60 × 475,419.36
  4. Step 4: Simplify right side
    636,844.62x = 417,849,688,691.14
  5. Step 5: Solve for x
    x = 417,849,688,691.14/636,844.62
  6. Step 6: Final answer
    x = 656,125.02

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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.