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Finding the Fourth Proportional to 724,600, 999,979.23 and 402,310.14

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Solution

The fourth proportional to 724,600, 999,979.23 and 402,310.14 is: 555,205.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,600 : 999,979.23 = 402,310.14 : x
  2. Step 2: Convert to fraction form
    724,600/999,979.23 = 402,310.14/x
  3. Step 3: Cross multiply
    724,600x = 999,979.23 × 402,310.14
  4. Step 4: Simplify right side
    724,600x = 402,301,784,018.39
  5. Step 5: Solve for x
    x = 402,301,784,018.39/724,600
  6. Step 6: Final answer
    x = 555,205.33

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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.