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Finding the Fourth Proportional to 903.60, 1,354.48 and 355.03

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Solution

The fourth proportional to 903.60, 1,354.48 and 355.03 is: 532.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.60 : 1,354.48 = 355.03 : x
  2. Step 2: Convert to fraction form
    903.60/1,354.48 = 355.03/x
  3. Step 3: Cross multiply
    903.60x = 1,354.48 × 355.03
  4. Step 4: Simplify right side
    903.60x = 480,876.76
  5. Step 5: Solve for x
    x = 480,876.76/903.60
  6. Step 6: Final answer
    x = 532.18

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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.