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Finding the Fourth Proportional to 628,270.75, 866,948.02 and 356,251.69

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Solution

The fourth proportional to 628,270.75, 866,948.02 and 356,251.69 is: 491,590.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,270.75 : 866,948.02 = 356,251.69 : x
  2. Step 2: Convert to fraction form
    628,270.75/866,948.02 = 356,251.69/x
  3. Step 3: Cross multiply
    628,270.75x = 866,948.02 × 356,251.69
  4. Step 4: Simplify right side
    628,270.75x = 308,851,697,267.15
  5. Step 5: Solve for x
    x = 308,851,697,267.15/628,270.75
  6. Step 6: Final answer
    x = 491,590.13

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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.