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Finding the Fourth Proportional to 773.19, 1,159.99 and 407.88

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Solution

The fourth proportional to 773.19, 1,159.99 and 407.88 is: 611.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.19 : 1,159.99 = 407.88 : x
  2. Step 2: Convert to fraction form
    773.19/1,159.99 = 407.88/x
  3. Step 3: Cross multiply
    773.19x = 1,159.99 × 407.88
  4. Step 4: Simplify right side
    773.19x = 473,135.70
  5. Step 5: Solve for x
    x = 473,135.70/773.19
  6. Step 6: Final answer
    x = 611.93

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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.