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Finding the Fourth Proportional to 657,187.20, 987,854.40 and 607,420.80

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Solution

The fourth proportional to 657,187.20, 987,854.40 and 607,420.80 is: 913,047.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,187.20 : 987,854.40 = 607,420.80 : x
  2. Step 2: Convert to fraction form
    657,187.20/987,854.40 = 607,420.80/x
  3. Step 3: Cross multiply
    657,187.20x = 987,854.40 × 607,420.80
  4. Step 4: Simplify right side
    657,187.20x = 600,043,309,931.52
  5. Step 5: Solve for x
    x = 600,043,309,931.52/657,187.20
  6. Step 6: Final answer
    x = 913,047.77

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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.