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Finding the Fourth Proportional to 724,284.90, 999,636.90 and 418,306.32

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Solution

The fourth proportional to 724,284.90, 999,636.90 and 418,306.32 is: 577,334.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,284.90 : 999,636.90 = 418,306.32 : x
  2. Step 2: Convert to fraction form
    724,284.90/999,636.90 = 418,306.32/x
  3. Step 3: Cross multiply
    724,284.90x = 999,636.90 × 418,306.32
  4. Step 4: Simplify right side
    724,284.90x = 418,154,432,975.21
  5. Step 5: Solve for x
    x = 418,154,432,975.21/724,284.90
  6. Step 6: Final answer
    x = 577,334.19

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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.