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Finding the Fourth Proportional to 903.07, 1,353.56 and 415.10

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Solution

The fourth proportional to 903.07, 1,353.56 and 415.10 is: 622.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.07 : 1,353.56 = 415.10 : x
  2. Step 2: Convert to fraction form
    903.07/1,353.56 = 415.10/x
  3. Step 3: Cross multiply
    903.07x = 1,353.56 × 415.10
  4. Step 4: Simplify right side
    903.07x = 561,862.76
  5. Step 5: Solve for x
    x = 561,862.76/903.07
  6. Step 6: Final answer
    x = 622.17

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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.