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Finding the Fourth Proportional to 1,134.66, 1,565.36 and 692.40

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Solution

The fourth proportional to 1,134.66, 1,565.36 and 692.40 is: 955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.66 : 1,565.36 = 692.40 : x
  2. Step 2: Convert to fraction form
    1,134.66/1,565.36 = 692.40/x
  3. Step 3: Cross multiply
    1,134.66x = 1,565.36 × 692.40
  4. Step 4: Simplify right side
    1,134.66x = 1,083,855.26
  5. Step 5: Solve for x
    x = 1,083,855.26/1,134.66
  6. Step 6: Final answer
    x = 955.22

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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.