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Finding the Fourth Proportional to 537.91, 741.66 and 390.49

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Solution

The fourth proportional to 537.91, 741.66 and 390.49 is: 538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.91 : 741.66 = 390.49 : x
  2. Step 2: Convert to fraction form
    537.91/741.66 = 390.49/x
  3. Step 3: Cross multiply
    537.91x = 741.66 × 390.49
  4. Step 4: Simplify right side
    537.91x = 289,607.49
  5. Step 5: Solve for x
    x = 289,607.49/537.91
  6. Step 6: Final answer
    x = 538.40

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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.