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Finding the Fourth Proportional to 724,599.48, 999,978.54 and 402,309.64

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Solution

The fourth proportional to 724,599.48, 999,978.54 and 402,309.64 is: 555,204.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,599.48 : 999,978.54 = 402,309.64 : x
  2. Step 2: Convert to fraction form
    724,599.48/999,978.54 = 402,309.64/x
  3. Step 3: Cross multiply
    724,599.48x = 999,978.54 × 402,309.64
  4. Step 4: Simplify right side
    724,599.48x = 402,301,006,435.13
  5. Step 5: Solve for x
    x = 402,301,006,435.13/724,599.48
  6. Step 6: Final answer
    x = 555,204.66

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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.