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Finding the Fourth Proportional to 707.81, 1,062.33 and 379.01

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Solution

The fourth proportional to 707.81, 1,062.33 and 379.01 is: 568.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.81 : 1,062.33 = 379.01 : x
  2. Step 2: Convert to fraction form
    707.81/1,062.33 = 379.01/x
  3. Step 3: Cross multiply
    707.81x = 1,062.33 × 379.01
  4. Step 4: Simplify right side
    707.81x = 402,633.69
  5. Step 5: Solve for x
    x = 402,633.69/707.81
  6. Step 6: Final answer
    x = 568.84

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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.