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Finding the Fourth Proportional to 748.51, 1,032.35 and 538.65

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Solution

The fourth proportional to 748.51, 1,032.35 and 538.65 is: 742.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.51 : 1,032.35 = 538.65 : x
  2. Step 2: Convert to fraction form
    748.51/1,032.35 = 538.65/x
  3. Step 3: Cross multiply
    748.51x = 1,032.35 × 538.65
  4. Step 4: Simplify right side
    748.51x = 556,072.63
  5. Step 5: Solve for x
    x = 556,072.63/748.51
  6. Step 6: Final answer
    x = 742.91

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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.