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Finding the Fourth Proportional to 545.82, 753.04 and 309.74

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Solution

The fourth proportional to 545.82, 753.04 and 309.74 is: 427.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.82 : 753.04 = 309.74 : x
  2. Step 2: Convert to fraction form
    545.82/753.04 = 309.74/x
  3. Step 3: Cross multiply
    545.82x = 753.04 × 309.74
  4. Step 4: Simplify right side
    545.82x = 233,246.61
  5. Step 5: Solve for x
    x = 233,246.61/545.82
  6. Step 6: Final answer
    x = 427.33

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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.