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Finding the Fourth Proportional to 410.15, 614.61 and 312.54

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Solution

The fourth proportional to 410.15, 614.61 and 312.54 is: 468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.15 : 614.61 = 312.54 : x
  2. Step 2: Convert to fraction form
    410.15/614.61 = 312.54/x
  3. Step 3: Cross multiply
    410.15x = 614.61 × 312.54
  4. Step 4: Simplify right side
    410.15x = 192,090.21
  5. Step 5: Solve for x
    x = 192,090.21/410.15
  6. Step 6: Final answer
    x = 468.35

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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.