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Finding the Fourth Proportional to 903.36, 1,353.93 and 440.45

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Solution

The fourth proportional to 903.36, 1,353.93 and 440.45 is: 660.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.36 : 1,353.93 = 440.45 : x
  2. Step 2: Convert to fraction form
    903.36/1,353.93 = 440.45/x
  3. Step 3: Cross multiply
    903.36x = 1,353.93 × 440.45
  4. Step 4: Simplify right side
    903.36x = 596,331.70
  5. Step 5: Solve for x
    x = 596,331.70/903.36
  6. Step 6: Final answer
    x = 660.13

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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.