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Finding the Fourth Proportional to 595,618.72, 821,538.15 and 391,604.42

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Solution

The fourth proportional to 595,618.72, 821,538.15 and 391,604.42 is: 540,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    595,618.72 : 821,538.15 = 391,604.42 : x
  2. Step 2: Convert to fraction form
    595,618.72/821,538.15 = 391,604.42/x
  3. Step 3: Cross multiply
    595,618.72x = 821,538.15 × 391,604.42
  4. Step 4: Simplify right side
    595,618.72x = 321,717,971,323.95
  5. Step 5: Solve for x
    x = 321,717,971,323.95/595,618.72
  6. Step 6: Final answer
    x = 540,140.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.