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Finding the Fourth Proportional to 572,005.30, 858,007.95 and 145,540.30

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Solution

The fourth proportional to 572,005.30, 858,007.95 and 145,540.30 is: 218,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,005.30 : 858,007.95 = 145,540.30 : x
  2. Step 2: Convert to fraction form
    572,005.30/858,007.95 = 145,540.30/x
  3. Step 3: Cross multiply
    572,005.30x = 858,007.95 × 145,540.30
  4. Step 4: Simplify right side
    572,005.30x = 124,874,734,445.39
  5. Step 5: Solve for x
    x = 124,874,734,445.39/572,005.30
  6. Step 6: Final answer
    x = 218,310.45

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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.