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Finding the Fourth Proportional to 959.88, 1,439.52 and 374.74

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Solution

The fourth proportional to 959.88, 1,439.52 and 374.74 is: 561.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.88 : 1,439.52 = 374.74 : x
  2. Step 2: Convert to fraction form
    959.88/1,439.52 = 374.74/x
  3. Step 3: Cross multiply
    959.88x = 1,439.52 × 374.74
  4. Step 4: Simplify right side
    959.88x = 539,440.72
  5. Step 5: Solve for x
    x = 539,440.72/959.88
  6. Step 6: Final answer
    x = 561.99

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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.