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Finding the Fourth Proportional to 584.40, 875.70 and 389.22

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Solution

The fourth proportional to 584.40, 875.70 and 389.22 is: 583.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.40 : 875.70 = 389.22 : x
  2. Step 2: Convert to fraction form
    584.40/875.70 = 389.22/x
  3. Step 3: Cross multiply
    584.40x = 875.70 × 389.22
  4. Step 4: Simplify right side
    584.40x = 340,839.95
  5. Step 5: Solve for x
    x = 340,839.95/584.40
  6. Step 6: Final answer
    x = 583.23

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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.