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Finding the Fourth Proportional to 458,199.60, 687,299.40 and 121,239.60

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Solution

The fourth proportional to 458,199.60, 687,299.40 and 121,239.60 is: 181,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,199.60 : 687,299.40 = 121,239.60 : x
  2. Step 2: Convert to fraction form
    458,199.60/687,299.40 = 121,239.60/x
  3. Step 3: Cross multiply
    458,199.60x = 687,299.40 × 121,239.60
  4. Step 4: Simplify right side
    458,199.60x = 83,327,904,336.24
  5. Step 5: Solve for x
    x = 83,327,904,336.24/458,199.60
  6. Step 6: Final answer
    x = 181,859.40

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Similar ratio
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1.5x scale

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.