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Finding the Fourth Proportional to 499,415.80, 749,123.70 and 331,454.20

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Solution

The fourth proportional to 499,415.80, 749,123.70 and 331,454.20 is: 497,181.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,415.80 : 749,123.70 = 331,454.20 : x
  2. Step 2: Convert to fraction form
    499,415.80/749,123.70 = 331,454.20/x
  3. Step 3: Cross multiply
    499,415.80x = 749,123.70 × 331,454.20
  4. Step 4: Simplify right side
    499,415.80x = 248,300,196,684.54
  5. Step 5: Solve for x
    x = 248,300,196,684.54/499,415.80
  6. Step 6: Final answer
    x = 497,181.30

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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.