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Finding the Fourth Proportional to 572,146.80, 858,220.20 and 320,204.40

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Solution

The fourth proportional to 572,146.80, 858,220.20 and 320,204.40 is: 480,306.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,146.80 : 858,220.20 = 320,204.40 : x
  2. Step 2: Convert to fraction form
    572,146.80/858,220.20 = 320,204.40/x
  3. Step 3: Cross multiply
    572,146.80x = 858,220.20 × 320,204.40
  4. Step 4: Simplify right side
    572,146.80x = 274,805,884,208.88
  5. Step 5: Solve for x
    x = 274,805,884,208.88/572,146.80
  6. Step 6: Final answer
    x = 480,306.60

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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.