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Finding the Fourth Proportional to 572,757.40, 859,136.10 and 198,780.40

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Solution

The fourth proportional to 572,757.40, 859,136.10 and 198,780.40 is: 298,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,757.40 : 859,136.10 = 198,780.40 : x
  2. Step 2: Convert to fraction form
    572,757.40/859,136.10 = 198,780.40/x
  3. Step 3: Cross multiply
    572,757.40x = 859,136.10 × 198,780.40
  4. Step 4: Simplify right side
    572,757.40x = 170,779,417,612.44
  5. Step 5: Solve for x
    x = 170,779,417,612.44/572,757.40
  6. Step 6: Final answer
    x = 298,170.60

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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.