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Finding the Fourth Proportional to 657,646.20, 986,469.30 and 637,963.20

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Solution

The fourth proportional to 657,646.20, 986,469.30 and 637,963.20 is: 956,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,646.20 : 986,469.30 = 637,963.20 : x
  2. Step 2: Convert to fraction form
    657,646.20/986,469.30 = 637,963.20/x
  3. Step 3: Cross multiply
    657,646.20x = 986,469.30 × 637,963.20
  4. Step 4: Simplify right side
    657,646.20x = 629,331,111,329.76
  5. Step 5: Solve for x
    x = 629,331,111,329.76/657,646.20
  6. Step 6: Final answer
    x = 956,944.80

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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.