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Finding the Fourth Proportional to 648,073.80, 972,110.70 and 611,332.20

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Solution

The fourth proportional to 648,073.80, 972,110.70 and 611,332.20 is: 916,998.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,073.80 : 972,110.70 = 611,332.20 : x
  2. Step 2: Convert to fraction form
    648,073.80/972,110.70 = 611,332.20/x
  3. Step 3: Cross multiply
    648,073.80x = 972,110.70 × 611,332.20
  4. Step 4: Simplify right side
    648,073.80x = 594,282,572,874.54
  5. Step 5: Solve for x
    x = 594,282,572,874.54/648,073.80
  6. Step 6: Final answer
    x = 916,998.30

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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.