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Finding the Fourth Proportional to 458,658.40, 687,987.60 and 440,287.60

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Solution

The fourth proportional to 458,658.40, 687,987.60 and 440,287.60 is: 660,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,658.40 : 687,987.60 = 440,287.60 : x
  2. Step 2: Convert to fraction form
    458,658.40/687,987.60 = 440,287.60/x
  3. Step 3: Cross multiply
    458,658.40x = 687,987.60 × 440,287.60
  4. Step 4: Simplify right side
    458,658.40x = 302,912,409,233.76
  5. Step 5: Solve for x
    x = 302,912,409,233.76/458,658.40
  6. Step 6: Final answer
    x = 660,431.40

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Similar ratio
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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.