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Finding the Fourth Proportional to 584.28, 875.40 and 520.72

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Solution

The fourth proportional to 584.28, 875.40 and 520.72 is: 780.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.28 : 875.40 = 520.72 : x
  2. Step 2: Convert to fraction form
    584.28/875.40 = 520.72/x
  3. Step 3: Cross multiply
    584.28x = 875.40 × 520.72
  4. Step 4: Simplify right side
    584.28x = 455,839.07
  5. Step 5: Solve for x
    x = 455,839.07/584.28
  6. Step 6: Final answer
    x = 780.17

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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.