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Finding the Fourth Proportional to 1,120.76, 1,545.26 and 910.16

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Solution

The fourth proportional to 1,120.76, 1,545.26 and 910.16 is: 1,254.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.76 : 1,545.26 = 910.16 : x
  2. Step 2: Convert to fraction form
    1,120.76/1,545.26 = 910.16/x
  3. Step 3: Cross multiply
    1,120.76x = 1,545.26 × 910.16
  4. Step 4: Simplify right side
    1,120.76x = 1,406,433.84
  5. Step 5: Solve for x
    x = 1,406,433.84/1,120.76
  6. Step 6: Final answer
    x = 1,254.89

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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.