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Finding the Fourth Proportional to 675.51, 1,013.26 and 521.66

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Solution

The fourth proportional to 675.51, 1,013.26 and 521.66 is: 782.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.51 : 1,013.26 = 521.66 : x
  2. Step 2: Convert to fraction form
    675.51/1,013.26 = 521.66/x
  3. Step 3: Cross multiply
    675.51x = 1,013.26 × 521.66
  4. Step 4: Simplify right side
    675.51x = 528,572.15
  5. Step 5: Solve for x
    x = 528,572.15/675.51
  6. Step 6: Final answer
    x = 782.48

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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.