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Finding the Fourth Proportional to 657,918.60, 987,108.30 and 284,209.80

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Solution

The fourth proportional to 657,918.60, 987,108.30 and 284,209.80 is: 426,414.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,918.60 : 987,108.30 = 284,209.80 : x
  2. Step 2: Convert to fraction form
    657,918.60/987,108.30 = 284,209.80/x
  3. Step 3: Cross multiply
    657,918.60x = 987,108.30 × 284,209.80
  4. Step 4: Simplify right side
    657,918.60x = 280,545,852,521.34
  5. Step 5: Solve for x
    x = 280,545,852,521.34/657,918.60
  6. Step 6: Final answer
    x = 426,414.23

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1.5x scale

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.