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Finding the Fourth Proportional to 718.16, 1,074.33 and 607.79

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Solution

The fourth proportional to 718.16, 1,074.33 and 607.79 is: 909.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.16 : 1,074.33 = 607.79 : x
  2. Step 2: Convert to fraction form
    718.16/1,074.33 = 607.79/x
  3. Step 3: Cross multiply
    718.16x = 1,074.33 × 607.79
  4. Step 4: Simplify right side
    718.16x = 652,969.72
  5. Step 5: Solve for x
    x = 652,969.72/718.16
  6. Step 6: Final answer
    x = 909.23

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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.