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Finding the Fourth Proportional to 395.49, 545.45 and 297.07

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Solution

The fourth proportional to 395.49, 545.45 and 297.07 is: 409.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.49 : 545.45 = 297.07 : x
  2. Step 2: Convert to fraction form
    395.49/545.45 = 297.07/x
  3. Step 3: Cross multiply
    395.49x = 545.45 × 297.07
  4. Step 4: Simplify right side
    395.49x = 162,036.71
  5. Step 5: Solve for x
    x = 162,036.71/395.49
  6. Step 6: Final answer
    x = 409.71

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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.