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Finding the Fourth Proportional to 614.20, 858.80 and 614.20

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Solution

The fourth proportional to 614.20, 858.80 and 614.20 is: 858.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.20 : 858.80 = 614.20 : x
  2. Step 2: Convert to fraction form
    614.20/858.80 = 614.20/x
  3. Step 3: Cross multiply
    614.20x = 858.80 × 614.20
  4. Step 4: Simplify right side
    614.20x = 527,474.96
  5. Step 5: Solve for x
    x = 527,474.96/614.20
  6. Step 6: Final answer
    x = 858.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.