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Finding the Fourth Proportional to 903.47, 1,355.20 and 580.88

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Solution

The fourth proportional to 903.47, 1,355.20 and 580.88 is: 871.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.47 : 1,355.20 = 580.88 : x
  2. Step 2: Convert to fraction form
    903.47/1,355.20 = 580.88/x
  3. Step 3: Cross multiply
    903.47x = 1,355.20 × 580.88
  4. Step 4: Simplify right side
    903.47x = 787,208.58
  5. Step 5: Solve for x
    x = 787,208.58/903.47
  6. Step 6: Final answer
    x = 871.32

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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.