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Finding the Fourth Proportional to 331,421.60, 497,132.40 and 305,760.80

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Solution

The fourth proportional to 331,421.60, 497,132.40 and 305,760.80 is: 458,641.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,421.60 : 497,132.40 = 305,760.80 : x
  2. Step 2: Convert to fraction form
    331,421.60/497,132.40 = 305,760.80/x
  3. Step 3: Cross multiply
    331,421.60x = 497,132.40 × 305,760.80
  4. Step 4: Simplify right side
    331,421.60x = 152,003,600,329.92
  5. Step 5: Solve for x
    x = 152,003,600,329.92/331,421.60
  6. Step 6: Final answer
    x = 458,641.20

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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.