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Finding the Fourth Proportional to 283,115.52, 390,697.92 and 155,787.84

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Solution

The fourth proportional to 283,115.52, 390,697.92 and 155,787.84 is: 214,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,115.52 : 390,697.92 = 155,787.84 : x
  2. Step 2: Convert to fraction form
    283,115.52/390,697.92 = 155,787.84/x
  3. Step 3: Cross multiply
    283,115.52x = 390,697.92 × 155,787.84
  4. Step 4: Simplify right side
    283,115.52x = 60,865,985,049.29
  5. Step 5: Solve for x
    x = 60,865,985,049.29/283,115.52
  6. Step 6: Final answer
    x = 214,986.40

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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.