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Finding the Fourth Proportional to 458,207.60, 687,311.40 and 121,247.60

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Solution

The fourth proportional to 458,207.60, 687,311.40 and 121,247.60 is: 181,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,207.60 : 687,311.40 = 121,247.60 : x
  2. Step 2: Convert to fraction form
    458,207.60/687,311.40 = 121,247.60/x
  3. Step 3: Cross multiply
    458,207.60x = 687,311.40 × 121,247.60
  4. Step 4: Simplify right side
    458,207.60x = 83,334,857,702.64
  5. Step 5: Solve for x
    x = 83,334,857,702.64/458,207.60
  6. Step 6: Final answer
    x = 181,871.40

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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.