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Finding the Fourth Proportional to 1,125.63, 1,557.63 and 959.58

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Solution

The fourth proportional to 1,125.63, 1,557.63 and 959.58 is: 1,327.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.63 : 1,557.63 = 959.58 : x
  2. Step 2: Convert to fraction form
    1,125.63/1,557.63 = 959.58/x
  3. Step 3: Cross multiply
    1,125.63x = 1,557.63 × 959.58
  4. Step 4: Simplify right side
    1,125.63x = 1,494,670.60
  5. Step 5: Solve for x
    x = 1,494,670.60/1,125.63
  6. Step 6: Final answer
    x = 1,327.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.