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Finding the Fourth Proportional to 959.71, 1,439.57 and 526.63

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Solution

The fourth proportional to 959.71, 1,439.57 and 526.63 is: 789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.71 : 1,439.57 = 526.63 : x
  2. Step 2: Convert to fraction form
    959.71/1,439.57 = 526.63/x
  3. Step 3: Cross multiply
    959.71x = 1,439.57 × 526.63
  4. Step 4: Simplify right side
    959.71x = 758,120.75
  5. Step 5: Solve for x
    x = 758,120.75/959.71
  6. Step 6: Final answer
    x = 789.95

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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.