Home / 498,110.31-687,445.25-304,631.21

Finding the Fourth Proportional to 498,110.31, 687,445.25 and 304,631.21

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Solution

The fourth proportional to 498,110.31, 687,445.25 and 304,631.21 is: 420,423.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,110.31 : 687,445.25 = 304,631.21 : x
  2. Step 2: Convert to fraction form
    498,110.31/687,445.25 = 304,631.21/x
  3. Step 3: Cross multiply
    498,110.31x = 687,445.25 × 304,631.21
  4. Step 4: Simplify right side
    498,110.31x = 209,417,278,511.71
  5. Step 5: Solve for x
    x = 209,417,278,511.71/498,110.31
  6. Step 6: Final answer
    x = 420,423.50

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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.