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Finding the Fourth Proportional to 583.40, 875.25 and 309.42

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Solution

The fourth proportional to 583.40, 875.25 and 309.42 is: 464.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.40 : 875.25 = 309.42 : x
  2. Step 2: Convert to fraction form
    583.40/875.25 = 309.42/x
  3. Step 3: Cross multiply
    583.40x = 875.25 × 309.42
  4. Step 4: Simplify right side
    583.40x = 270,813.93
  5. Step 5: Solve for x
    x = 270,813.93/583.40
  6. Step 6: Final answer
    x = 464.20

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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.