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Finding the Fourth Proportional to 545.64, 815.03 and 454.42

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Solution

The fourth proportional to 545.64, 815.03 and 454.42 is: 678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.64 : 815.03 = 454.42 : x
  2. Step 2: Convert to fraction form
    545.64/815.03 = 454.42/x
  3. Step 3: Cross multiply
    545.64x = 815.03 × 454.42
  4. Step 4: Simplify right side
    545.64x = 370,365.93
  5. Step 5: Solve for x
    x = 370,365.93/545.64
  6. Step 6: Final answer
    x = 678.77

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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.