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Finding the Fourth Proportional to 724,538.79, 999,813.60 and 402,223.86

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Solution

The fourth proportional to 724,538.79, 999,813.60 and 402,223.86 is: 555,041.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,538.79 : 999,813.60 = 402,223.86 : x
  2. Step 2: Convert to fraction form
    724,538.79/999,813.60 = 402,223.86/x
  3. Step 3: Cross multiply
    724,538.79x = 999,813.60 × 402,223.86
  4. Step 4: Simplify right side
    724,538.79x = 402,148,885,472.50
  5. Step 5: Solve for x
    x = 402,148,885,472.50/724,538.79
  6. Step 6: Final answer
    x = 555,041.21

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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.