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Finding the Fourth Proportional to 384,138.60, 576,207.90 and 103,655.40

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Solution

The fourth proportional to 384,138.60, 576,207.90 and 103,655.40 is: 155,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,138.60 : 576,207.90 = 103,655.40 : x
  2. Step 2: Convert to fraction form
    384,138.60/576,207.90 = 103,655.40/x
  3. Step 3: Cross multiply
    384,138.60x = 576,207.90 × 103,655.40
  4. Step 4: Simplify right side
    384,138.60x = 59,727,060,357.66
  5. Step 5: Solve for x
    x = 59,727,060,357.66/384,138.60
  6. Step 6: Final answer
    x = 155,483.10

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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.