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Finding the Fourth Proportional to 903.20, 1,355.56 and 630.48

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Solution

The fourth proportional to 903.20, 1,355.56 and 630.48 is: 946.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.20 : 1,355.56 = 630.48 : x
  2. Step 2: Convert to fraction form
    903.20/1,355.56 = 630.48/x
  3. Step 3: Cross multiply
    903.20x = 1,355.56 × 630.48
  4. Step 4: Simplify right side
    903.20x = 854,653.47
  5. Step 5: Solve for x
    x = 854,653.47/903.20
  6. Step 6: Final answer
    x = 946.25

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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.