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Finding the Fourth Proportional to 564,132.76, 778,489.68 and 309,481.72

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Solution

The fourth proportional to 564,132.76, 778,489.68 and 309,481.72 is: 427,077.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,132.76 : 778,489.68 = 309,481.72 : x
  2. Step 2: Convert to fraction form
    564,132.76/778,489.68 = 309,481.72/x
  3. Step 3: Cross multiply
    564,132.76x = 778,489.68 × 309,481.72
  4. Step 4: Simplify right side
    564,132.76x = 240,928,325,168.65
  5. Step 5: Solve for x
    x = 240,928,325,168.65/564,132.76
  6. Step 6: Final answer
    x = 427,077.35

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.