Home / 578,433.20-868,686.60-420,839.60

Finding the Fourth Proportional to 578,433.20, 868,686.60 and 420,839.60

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Solution

The fourth proportional to 578,433.20, 868,686.60 and 420,839.60 is: 632,013.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,433.20 : 868,686.60 = 420,839.60 : x
  2. Step 2: Convert to fraction form
    578,433.20/868,686.60 = 420,839.60/x
  3. Step 3: Cross multiply
    578,433.20x = 868,686.60 × 420,839.60
  4. Step 4: Simplify right side
    578,433.20x = 365,577,721,269.36
  5. Step 5: Solve for x
    x = 365,577,721,269.36/578,433.20
  6. Step 6: Final answer
    x = 632,013.72

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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.