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Finding the Fourth Proportional to 283,240.96, 390,886.56 and 155,915.20

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Solution

The fourth proportional to 283,240.96, 390,886.56 and 155,915.20 is: 215,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,240.96 : 390,886.56 = 155,915.20 : x
  2. Step 2: Convert to fraction form
    283,240.96/390,886.56 = 155,915.20/x
  3. Step 3: Cross multiply
    283,240.96x = 390,886.56 × 155,915.20
  4. Step 4: Simplify right side
    283,240.96x = 60,945,156,179.71
  5. Step 5: Solve for x
    x = 60,945,156,179.71/283,240.96
  6. Step 6: Final answer
    x = 215,170.70

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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.