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Finding the Fourth Proportional to 283,143.32, 390,737.84 and 155,818.92

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Solution

The fourth proportional to 283,143.32, 390,737.84 and 155,818.92 is: 215,030.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,143.32 : 390,737.84 = 155,818.92 : x
  2. Step 2: Convert to fraction form
    283,143.32/390,737.84 = 155,818.92/x
  3. Step 3: Cross multiply
    283,143.32x = 390,737.84 × 155,818.92
  4. Step 4: Simplify right side
    283,143.32x = 60,884,348,231.93
  5. Step 5: Solve for x
    x = 60,884,348,231.93/283,143.32
  6. Step 6: Final answer
    x = 215,030.14

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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.