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Finding the Fourth Proportional to 610,410.30, 915,615.45 and 278,634.30

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Solution

The fourth proportional to 610,410.30, 915,615.45 and 278,634.30 is: 417,951.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,410.30 : 915,615.45 = 278,634.30 : x
  2. Step 2: Convert to fraction form
    610,410.30/915,615.45 = 278,634.30/x
  3. Step 3: Cross multiply
    610,410.30x = 915,615.45 × 278,634.30
  4. Step 4: Simplify right side
    610,410.30x = 255,121,869,979.94
  5. Step 5: Solve for x
    x = 255,121,869,979.94/610,410.30
  6. Step 6: Final answer
    x = 417,951.45

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Double scale
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Similar ratio
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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.