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Finding the Fourth Proportional to 572,085.80, 858,128.70 and 151,404.20

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Solution

The fourth proportional to 572,085.80, 858,128.70 and 151,404.20 is: 227,106.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,085.80 : 858,128.70 = 151,404.20 : x
  2. Step 2: Convert to fraction form
    572,085.80/858,128.70 = 151,404.20/x
  3. Step 3: Cross multiply
    572,085.80x = 858,128.70 × 151,404.20
  4. Step 4: Simplify right side
    572,085.80x = 129,924,289,320.54
  5. Step 5: Solve for x
    x = 129,924,289,320.54/572,085.80
  6. Step 6: Final answer
    x = 227,106.30

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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.