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Finding the Fourth Proportional to 959.88, 1,444.98 and 870.48

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Solution

The fourth proportional to 959.88, 1,444.98 and 870.48 is: 1,310.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.88 : 1,444.98 = 870.48 : x
  2. Step 2: Convert to fraction form
    959.88/1,444.98 = 870.48/x
  3. Step 3: Cross multiply
    959.88x = 1,444.98 × 870.48
  4. Step 4: Simplify right side
    959.88x = 1,257,826.19
  5. Step 5: Solve for x
    x = 1,257,826.19/959.88
  6. Step 6: Final answer
    x = 1,310.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.