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Finding the Fourth Proportional to 572,155.80, 858,233.70 and 320,213.40

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Solution

The fourth proportional to 572,155.80, 858,233.70 and 320,213.40 is: 480,320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,155.80 : 858,233.70 = 320,213.40 : x
  2. Step 2: Convert to fraction form
    572,155.80/858,233.70 = 320,213.40/x
  3. Step 3: Cross multiply
    572,155.80x = 858,233.70 × 320,213.40
  4. Step 4: Simplify right side
    572,155.80x = 274,817,931,071.58
  5. Step 5: Solve for x
    x = 274,817,931,071.58/572,155.80
  6. Step 6: Final answer
    x = 480,320.10

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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.