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Finding the Fourth Proportional to 545.64, 819.42 and 289.32

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Solution

The fourth proportional to 545.64, 819.42 and 289.32 is: 434.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.64 : 819.42 = 289.32 : x
  2. Step 2: Convert to fraction form
    545.64/819.42 = 289.32/x
  3. Step 3: Cross multiply
    545.64x = 819.42 × 289.32
  4. Step 4: Simplify right side
    545.64x = 237,074.59
  5. Step 5: Solve for x
    x = 237,074.59/545.64
  6. Step 6: Final answer
    x = 434.49

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1.5x scale

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.