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Finding the Fourth Proportional to 458,077.60, 687,116.40 and 407,339.20

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Solution

The fourth proportional to 458,077.60, 687,116.40 and 407,339.20 is: 611,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,077.60 : 687,116.40 = 407,339.20 : x
  2. Step 2: Convert to fraction form
    458,077.60/687,116.40 = 407,339.20/x
  3. Step 3: Cross multiply
    458,077.60x = 687,116.40 × 407,339.20
  4. Step 4: Simplify right side
    458,077.60x = 279,889,444,682.88
  5. Step 5: Solve for x
    x = 279,889,444,682.88/458,077.60
  6. Step 6: Final answer
    x = 611,008.80

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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.