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Finding the Fourth Proportional to 458,520.70, 687,781.05 and 299,091.10

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Solution

The fourth proportional to 458,520.70, 687,781.05 and 299,091.10 is: 448,636.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,520.70 : 687,781.05 = 299,091.10 : x
  2. Step 2: Convert to fraction form
    458,520.70/687,781.05 = 299,091.10/x
  3. Step 3: Cross multiply
    458,520.70x = 687,781.05 × 299,091.10
  4. Step 4: Simplify right side
    458,520.70x = 205,709,190,803.66
  5. Step 5: Solve for x
    x = 205,709,190,803.66/458,520.70
  6. Step 6: Final answer
    x = 448,636.65

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Double scale
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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.