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Finding the Fourth Proportional to 641.68, 886.07 and 608.87

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Solution

The fourth proportional to 641.68, 886.07 and 608.87 is: 840.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.68 : 886.07 = 608.87 : x
  2. Step 2: Convert to fraction form
    641.68/886.07 = 608.87/x
  3. Step 3: Cross multiply
    641.68x = 886.07 × 608.87
  4. Step 4: Simplify right side
    641.68x = 539,498.40
  5. Step 5: Solve for x
    x = 539,498.40/641.68
  6. Step 6: Final answer
    x = 840.77

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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.