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Finding the Fourth Proportional to 718.51, 1,077.67 and 231.50

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Solution

The fourth proportional to 718.51, 1,077.67 and 231.50 is: 347.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.51 : 1,077.67 = 231.50 : x
  2. Step 2: Convert to fraction form
    718.51/1,077.67 = 231.50/x
  3. Step 3: Cross multiply
    718.51x = 1,077.67 × 231.50
  4. Step 4: Simplify right side
    718.51x = 249,480.61
  5. Step 5: Solve for x
    x = 249,480.61/718.51
  6. Step 6: Final answer
    x = 347.22

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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.