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Finding the Fourth Proportional to 583.53, 805.47 and 387.11

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Solution

The fourth proportional to 583.53, 805.47 and 387.11 is: 534.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.53 : 805.47 = 387.11 : x
  2. Step 2: Convert to fraction form
    583.53/805.47 = 387.11/x
  3. Step 3: Cross multiply
    583.53x = 805.47 × 387.11
  4. Step 4: Simplify right side
    583.53x = 311,801.46
  5. Step 5: Solve for x
    x = 311,801.46/583.53
  6. Step 6: Final answer
    x = 534.34

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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.