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Finding the Fourth Proportional to 545,701.70, 818,552.55 and 431,540.30

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Solution

The fourth proportional to 545,701.70, 818,552.55 and 431,540.30 is: 647,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,701.70 : 818,552.55 = 431,540.30 : x
  2. Step 2: Convert to fraction form
    545,701.70/818,552.55 = 431,540.30/x
  3. Step 3: Cross multiply
    545,701.70x = 818,552.55 × 431,540.30
  4. Step 4: Simplify right side
    545,701.70x = 353,238,412,992.77
  5. Step 5: Solve for x
    x = 353,238,412,992.77/545,701.70
  6. Step 6: Final answer
    x = 647,310.45

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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.