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Finding the Fourth Proportional to 620.60, 854.40 and 542.92

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Solution

The fourth proportional to 620.60, 854.40 and 542.92 is: 747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.60 : 854.40 = 542.92 : x
  2. Step 2: Convert to fraction form
    620.60/854.40 = 542.92/x
  3. Step 3: Cross multiply
    620.60x = 854.40 × 542.92
  4. Step 4: Simplify right side
    620.60x = 463,870.85
  5. Step 5: Solve for x
    x = 463,870.85/620.60
  6. Step 6: Final answer
    x = 747.46

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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.