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Finding the Fourth Proportional to 537.73, 740.40 and 420.18

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Solution

The fourth proportional to 537.73, 740.40 and 420.18 is: 578.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.73 : 740.40 = 420.18 : x
  2. Step 2: Convert to fraction form
    537.73/740.40 = 420.18/x
  3. Step 3: Cross multiply
    537.73x = 740.40 × 420.18
  4. Step 4: Simplify right side
    537.73x = 311,101.27
  5. Step 5: Solve for x
    x = 311,101.27/537.73
  6. Step 6: Final answer
    x = 578.55

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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.