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Finding the Fourth Proportional to 423,086.40, 634,658.40 and 134,875.20

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Solution

The fourth proportional to 423,086.40, 634,658.40 and 134,875.20 is: 202,321.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,086.40 : 634,658.40 = 134,875.20 : x
  2. Step 2: Convert to fraction form
    423,086.40/634,658.40 = 134,875.20/x
  3. Step 3: Cross multiply
    423,086.40x = 634,658.40 × 134,875.20
  4. Step 4: Simplify right side
    423,086.40x = 85,599,678,631.68
  5. Step 5: Solve for x
    x = 85,599,678,631.68/423,086.40
  6. Step 6: Final answer
    x = 202,321.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.