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Finding the Fourth Proportional to 389,708.60, 584,562.90 and 239,461.70

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Solution

The fourth proportional to 389,708.60, 584,562.90 and 239,461.70 is: 359,192.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,708.60 : 584,562.90 = 239,461.70 : x
  2. Step 2: Convert to fraction form
    389,708.60/584,562.90 = 239,461.70/x
  3. Step 3: Cross multiply
    389,708.60x = 584,562.90 × 239,461.70
  4. Step 4: Simplify right side
    389,708.60x = 139,980,425,790.93
  5. Step 5: Solve for x
    x = 139,980,425,790.93/389,708.60
  6. Step 6: Final answer
    x = 359,192.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.