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Finding the Fourth Proportional to 283,141.98, 390,737.79 and 155,814.30

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Solution

The fourth proportional to 283,141.98, 390,737.79 and 155,814.30 is: 215,024.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,141.98 : 390,737.79 = 155,814.30 : x
  2. Step 2: Convert to fraction form
    283,141.98/390,737.79 = 155,814.30/x
  3. Step 3: Cross multiply
    283,141.98x = 390,737.79 × 155,814.30
  4. Step 4: Simplify right side
    283,141.98x = 60,882,535,232.40
  5. Step 5: Solve for x
    x = 60,882,535,232.40/283,141.98
  6. Step 6: Final answer
    x = 215,024.76

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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.