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Finding the Fourth Proportional to 689.17, 950.14 and 570.71

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Solution

The fourth proportional to 689.17, 950.14 and 570.71 is: 786.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.17 : 950.14 = 570.71 : x
  2. Step 2: Convert to fraction form
    689.17/950.14 = 570.71/x
  3. Step 3: Cross multiply
    689.17x = 950.14 × 570.71
  4. Step 4: Simplify right side
    689.17x = 542,254.40
  5. Step 5: Solve for x
    x = 542,254.40/689.17
  6. Step 6: Final answer
    x = 786.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.