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Finding the Fourth Proportional to 583.12, 875.04 and 258.40

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Solution

The fourth proportional to 583.12, 875.04 and 258.40 is: 387.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.12 : 875.04 = 258.40 : x
  2. Step 2: Convert to fraction form
    583.12/875.04 = 258.40/x
  3. Step 3: Cross multiply
    583.12x = 875.04 × 258.40
  4. Step 4: Simplify right side
    583.12x = 226,110.34
  5. Step 5: Solve for x
    x = 226,110.34/583.12
  6. Step 6: Final answer
    x = 387.76

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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.