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Finding the Fourth Proportional to 689.79, 951.48 and 606.90

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Solution

The fourth proportional to 689.79, 951.48 and 606.90 is: 837.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.79 : 951.48 = 606.90 : x
  2. Step 2: Convert to fraction form
    689.79/951.48 = 606.90/x
  3. Step 3: Cross multiply
    689.79x = 951.48 × 606.90
  4. Step 4: Simplify right side
    689.79x = 577,453.21
  5. Step 5: Solve for x
    x = 577,453.21/689.79
  6. Step 6: Final answer
    x = 837.14

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1.5x scale

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.