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Finding the Fourth Proportional to 1,140.02, 1,708.44 and 909.63

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Solution

The fourth proportional to 1,140.02, 1,708.44 and 909.63 is: 1,363.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.02 : 1,708.44 = 909.63 : x
  2. Step 2: Convert to fraction form
    1,140.02/1,708.44 = 909.63/x
  3. Step 3: Cross multiply
    1,140.02x = 1,708.44 × 909.63
  4. Step 4: Simplify right side
    1,140.02x = 1,554,049.98
  5. Step 5: Solve for x
    x = 1,554,049.98/1,140.02
  6. Step 6: Final answer
    x = 1,363.17

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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.