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Finding the Fourth Proportional to 583.70, 805.40 and 387.14

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Solution

The fourth proportional to 583.70, 805.40 and 387.14 is: 534.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.70 : 805.40 = 387.14 : x
  2. Step 2: Convert to fraction form
    583.70/805.40 = 387.14/x
  3. Step 3: Cross multiply
    583.70x = 805.40 × 387.14
  4. Step 4: Simplify right side
    583.70x = 311,802.56
  5. Step 5: Solve for x
    x = 311,802.56/583.70
  6. Step 6: Final answer
    x = 534.18

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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.