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Finding the Fourth Proportional to 458,879.70, 688,319.55 and 299,447.40

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Solution

The fourth proportional to 458,879.70, 688,319.55 and 299,447.40 is: 449,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,879.70 : 688,319.55 = 299,447.40 : x
  2. Step 2: Convert to fraction form
    458,879.70/688,319.55 = 299,447.40/x
  3. Step 3: Cross multiply
    458,879.70x = 688,319.55 × 299,447.40
  4. Step 4: Simplify right side
    458,879.70x = 206,115,499,616.67
  5. Step 5: Solve for x
    x = 206,115,499,616.67/458,879.70
  6. Step 6: Final answer
    x = 449,171.10

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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.