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Finding the Fourth Proportional to 412.49, 569.41 and 307.91

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Solution

The fourth proportional to 412.49, 569.41 and 307.91 is: 425.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.49 : 569.41 = 307.91 : x
  2. Step 2: Convert to fraction form
    412.49/569.41 = 307.91/x
  3. Step 3: Cross multiply
    412.49x = 569.41 × 307.91
  4. Step 4: Simplify right side
    412.49x = 175,323.42
  5. Step 5: Solve for x
    x = 175,323.42/412.49
  6. Step 6: Final answer
    x = 425.04

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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.