Home / 486,421.40-729,632.10-131,490.20

Finding the Fourth Proportional to 486,421.40, 729,632.10 and 131,490.20

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Solution

The fourth proportional to 486,421.40, 729,632.10 and 131,490.20 is: 197,235.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,421.40 : 729,632.10 = 131,490.20 : x
  2. Step 2: Convert to fraction form
    486,421.40/729,632.10 = 131,490.20/x
  3. Step 3: Cross multiply
    486,421.40x = 729,632.10 × 131,490.20
  4. Step 4: Simplify right side
    486,421.40x = 95,939,470,755.42
  5. Step 5: Solve for x
    x = 95,939,470,755.42/486,421.40
  6. Step 6: Final answer
    x = 197,235.30

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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.