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Finding the Fourth Proportional to 572,147.80, 858,221.70 and 320,205.40

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Solution

The fourth proportional to 572,147.80, 858,221.70 and 320,205.40 is: 480,308.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,147.80 : 858,221.70 = 320,205.40 : x
  2. Step 2: Convert to fraction form
    572,147.80/858,221.70 = 320,205.40/x
  3. Step 3: Cross multiply
    572,147.80x = 858,221.70 × 320,205.40
  4. Step 4: Simplify right side
    572,147.80x = 274,807,222,737.18
  5. Step 5: Solve for x
    x = 274,807,222,737.18/572,147.80
  6. Step 6: Final answer
    x = 480,308.10

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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.