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Finding the Fourth Proportional to 572,086.30, 858,129.45 and 145,621.30

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Solution

The fourth proportional to 572,086.30, 858,129.45 and 145,621.30 is: 218,431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,086.30 : 858,129.45 = 145,621.30 : x
  2. Step 2: Convert to fraction form
    572,086.30/858,129.45 = 145,621.30/x
  3. Step 3: Cross multiply
    572,086.30x = 858,129.45 × 145,621.30
  4. Step 4: Simplify right side
    572,086.30x = 124,961,926,077.29
  5. Step 5: Solve for x
    x = 124,961,926,077.29/572,086.30
  6. Step 6: Final answer
    x = 218,431.95

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Half scale
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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.