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Finding the Fourth Proportional to 610,414.30, 915,621.45 and 278,638.30

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Solution

The fourth proportional to 610,414.30, 915,621.45 and 278,638.30 is: 417,957.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,414.30 : 915,621.45 = 278,638.30 : x
  2. Step 2: Convert to fraction form
    610,414.30/915,621.45 = 278,638.30/x
  3. Step 3: Cross multiply
    610,414.30x = 915,621.45 × 278,638.30
  4. Step 4: Simplify right side
    610,414.30x = 255,127,204,271.54
  5. Step 5: Solve for x
    x = 255,127,204,271.54/610,414.30
  6. Step 6: Final answer
    x = 417,957.45

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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.