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Finding the Fourth Proportional to 610,709.40, 915,626.70 and 255,540.60

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Solution

The fourth proportional to 610,709.40, 915,626.70 and 255,540.60 is: 383,127.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,709.40 : 915,626.70 = 255,540.60 : x
  2. Step 2: Convert to fraction form
    610,709.40/915,626.70 = 255,540.60/x
  3. Step 3: Cross multiply
    610,709.40x = 915,626.70 × 255,540.60
  4. Step 4: Simplify right side
    610,709.40x = 233,979,796,294.02
  5. Step 5: Solve for x
    x = 233,979,796,294.02/610,709.40
  6. Step 6: Final answer
    x = 383,127.88

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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.