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Finding the Fourth Proportional to 1,043.35, 1,557.09 and 959.35

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Solution

The fourth proportional to 1,043.35, 1,557.09 and 959.35 is: 1,431.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.35 : 1,557.09 = 959.35 : x
  2. Step 2: Convert to fraction form
    1,043.35/1,557.09 = 959.35/x
  3. Step 3: Cross multiply
    1,043.35x = 1,557.09 × 959.35
  4. Step 4: Simplify right side
    1,043.35x = 1,493,794.29
  5. Step 5: Solve for x
    x = 1,493,794.29/1,043.35
  6. Step 6: Final answer
    x = 1,431.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.