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Finding the Fourth Proportional to 458,043.20, 687,064.80 and 270,958.40

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Solution

The fourth proportional to 458,043.20, 687,064.80 and 270,958.40 is: 406,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,043.20 : 687,064.80 = 270,958.40 : x
  2. Step 2: Convert to fraction form
    458,043.20/687,064.80 = 270,958.40/x
  3. Step 3: Cross multiply
    458,043.20x = 687,064.80 × 270,958.40
  4. Step 4: Simplify right side
    458,043.20x = 186,165,978,904.32
  5. Step 5: Solve for x
    x = 186,165,978,904.32/458,043.20
  6. Step 6: Final answer
    x = 406,437.60

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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.