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Finding the Fourth Proportional to 584.40, 875.76 and 422.40

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Solution

The fourth proportional to 584.40, 875.76 and 422.40 is: 632.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.40 : 875.76 = 422.40 : x
  2. Step 2: Convert to fraction form
    584.40/875.76 = 422.40/x
  3. Step 3: Cross multiply
    584.40x = 875.76 × 422.40
  4. Step 4: Simplify right side
    584.40x = 369,921.02
  5. Step 5: Solve for x
    x = 369,921.02/584.40
  6. Step 6: Final answer
    x = 632.99

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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.