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Finding the Fourth Proportional to 657.05, 985.80 and 292.10

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Solution

The fourth proportional to 657.05, 985.80 and 292.10 is: 438.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.05 : 985.80 = 292.10 : x
  2. Step 2: Convert to fraction form
    657.05/985.80 = 292.10/x
  3. Step 3: Cross multiply
    657.05x = 985.80 × 292.10
  4. Step 4: Simplify right side
    657.05x = 287,948.35
  5. Step 5: Solve for x
    x = 287,948.35/657.05
  6. Step 6: Final answer
    x = 438.24

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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.