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Finding the Fourth Proportional to 1,113.84, 1,672.26 and 750.30

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Solution

The fourth proportional to 1,113.84, 1,672.26 and 750.30 is: 1,126.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.84 : 1,672.26 = 750.30 : x
  2. Step 2: Convert to fraction form
    1,113.84/1,672.26 = 750.30/x
  3. Step 3: Cross multiply
    1,113.84x = 1,672.26 × 750.30
  4. Step 4: Simplify right side
    1,113.84x = 1,254,696.68
  5. Step 5: Solve for x
    x = 1,254,696.68/1,113.84
  6. Step 6: Final answer
    x = 1,126.46

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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.