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Finding the Fourth Proportional to 949.76, 1,423.40 and 539.08

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Solution

The fourth proportional to 949.76, 1,423.40 and 539.08 is: 807.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.76 : 1,423.40 = 539.08 : x
  2. Step 2: Convert to fraction form
    949.76/1,423.40 = 539.08/x
  3. Step 3: Cross multiply
    949.76x = 1,423.40 × 539.08
  4. Step 4: Simplify right side
    949.76x = 767,326.47
  5. Step 5: Solve for x
    x = 767,326.47/949.76
  6. Step 6: Final answer
    x = 807.92

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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.