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Finding the Fourth Proportional to 545.09, 816.91 and 314.10

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Solution

The fourth proportional to 545.09, 816.91 and 314.10 is: 470.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.09 : 816.91 = 314.10 : x
  2. Step 2: Convert to fraction form
    545.09/816.91 = 314.10/x
  3. Step 3: Cross multiply
    545.09x = 816.91 × 314.10
  4. Step 4: Simplify right side
    545.09x = 256,590.65
  5. Step 5: Solve for x
    x = 256,590.65/545.09
  6. Step 6: Final answer
    x = 470.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.