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Finding the Fourth Proportional to 428,282.76, 591,005.52 and 237,284.76

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Solution

The fourth proportional to 428,282.76, 591,005.52 and 237,284.76 is: 327,439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,282.76 : 591,005.52 = 237,284.76 : x
  2. Step 2: Convert to fraction form
    428,282.76/591,005.52 = 237,284.76/x
  3. Step 3: Cross multiply
    428,282.76x = 591,005.52 × 237,284.76
  4. Step 4: Simplify right side
    428,282.76x = 140,236,602,971.88
  5. Step 5: Solve for x
    x = 140,236,602,971.88/428,282.76
  6. Step 6: Final answer
    x = 327,439.29

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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.