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Finding the Fourth Proportional to 410.30, 565.84 and 305.65

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Solution

The fourth proportional to 410.30, 565.84 and 305.65 is: 421.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.30 : 565.84 = 305.65 : x
  2. Step 2: Convert to fraction form
    410.30/565.84 = 305.65/x
  3. Step 3: Cross multiply
    410.30x = 565.84 × 305.65
  4. Step 4: Simplify right side
    410.30x = 172,946.82
  5. Step 5: Solve for x
    x = 172,946.82/410.30
  6. Step 6: Final answer
    x = 421.51

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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.