Home / 656,839.20-985,647.60-478,898.40

Finding the Fourth Proportional to 656,839.20, 985,647.60 and 478,898.40

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Solution

The fourth proportional to 656,839.20, 985,647.60 and 478,898.40 is: 718,631.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,839.20 : 985,647.60 = 478,898.40 : x
  2. Step 2: Convert to fraction form
    656,839.20/985,647.60 = 478,898.40/x
  3. Step 3: Cross multiply
    656,839.20x = 985,647.60 × 478,898.40
  4. Step 4: Simplify right side
    656,839.20x = 472,025,058,603.84
  5. Step 5: Solve for x
    x = 472,025,058,603.84/656,839.20
  6. Step 6: Final answer
    x = 718,631.07

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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.