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Finding the Fourth Proportional to 657,487.80, 986,231.70 and 648,630.45

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Solution

The fourth proportional to 657,487.80, 986,231.70 and 648,630.45 is: 972,945.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,487.80 : 986,231.70 = 648,630.45 : x
  2. Step 2: Convert to fraction form
    657,487.80/986,231.70 = 648,630.45/x
  3. Step 3: Cross multiply
    657,487.80x = 986,231.70 × 648,630.45
  4. Step 4: Simplify right side
    657,487.80x = 639,699,911,375.27
  5. Step 5: Solve for x
    x = 639,699,911,375.27/657,487.80
  6. Step 6: Final answer
    x = 972,945.68

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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.