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Finding the Fourth Proportional to 486,710.40, 730,065.60 and 131,779.20

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Solution

The fourth proportional to 486,710.40, 730,065.60 and 131,779.20 is: 197,668.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,710.40 : 730,065.60 = 131,779.20 : x
  2. Step 2: Convert to fraction form
    486,710.40/730,065.60 = 131,779.20/x
  3. Step 3: Cross multiply
    486,710.40x = 730,065.60 × 131,779.20
  4. Step 4: Simplify right side
    486,710.40x = 96,207,460,715.52
  5. Step 5: Solve for x
    x = 96,207,460,715.52/486,710.40
  6. Step 6: Final answer
    x = 197,668.80

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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.