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Finding the Fourth Proportional to 713.65, 1,065.64 and 610.78

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Solution

The fourth proportional to 713.65, 1,065.64 and 610.78 is: 912.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.65 : 1,065.64 = 610.78 : x
  2. Step 2: Convert to fraction form
    713.65/1,065.64 = 610.78/x
  3. Step 3: Cross multiply
    713.65x = 1,065.64 × 610.78
  4. Step 4: Simplify right side
    713.65x = 650,871.60
  5. Step 5: Solve for x
    x = 650,871.60/713.65
  6. Step 6: Final answer
    x = 912.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.