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Finding the Fourth Proportional to 545.42, 813.86 and 479.81

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Solution

The fourth proportional to 545.42, 813.86 and 479.81 is: 715.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.42 : 813.86 = 479.81 : x
  2. Step 2: Convert to fraction form
    545.42/813.86 = 479.81/x
  3. Step 3: Cross multiply
    545.42x = 813.86 × 479.81
  4. Step 4: Simplify right side
    545.42x = 390,491.70
  5. Step 5: Solve for x
    x = 390,491.70/545.42
  6. Step 6: Final answer
    x = 715.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.