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Finding the Fourth Proportional to 572,542.20, 858,813.30 and 320,599.80

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Solution

The fourth proportional to 572,542.20, 858,813.30 and 320,599.80 is: 480,899.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,542.20 : 858,813.30 = 320,599.80 : x
  2. Step 2: Convert to fraction form
    572,542.20/858,813.30 = 320,599.80/x
  3. Step 3: Cross multiply
    572,542.20x = 858,813.30 × 320,599.80
  4. Step 4: Simplify right side
    572,542.20x = 275,335,372,217.34
  5. Step 5: Solve for x
    x = 275,335,372,217.34/572,542.20
  6. Step 6: Final answer
    x = 480,899.70

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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.