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Finding the Fourth Proportional to 542.94, 818.06 and 491.64

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Solution

The fourth proportional to 542.94, 818.06 and 491.64 is: 740.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.94 : 818.06 = 491.64 : x
  2. Step 2: Convert to fraction form
    542.94/818.06 = 491.64/x
  3. Step 3: Cross multiply
    542.94x = 818.06 × 491.64
  4. Step 4: Simplify right side
    542.94x = 402,191.02
  5. Step 5: Solve for x
    x = 402,191.02/542.94
  6. Step 6: Final answer
    x = 740.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.