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Finding the Fourth Proportional to 530,765.54, 732,487.20 and 399,708.50

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Solution

The fourth proportional to 530,765.54, 732,487.20 and 399,708.50 is: 551,620.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,765.54 : 732,487.20 = 399,708.50 : x
  2. Step 2: Convert to fraction form
    530,765.54/732,487.20 = 399,708.50/x
  3. Step 3: Cross multiply
    530,765.54x = 732,487.20 × 399,708.50
  4. Step 4: Simplify right side
    530,765.54x = 292,781,359,128.34
  5. Step 5: Solve for x
    x = 292,781,359,128.34/530,765.54
  6. Step 6: Final answer
    x = 551,620.89

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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.