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Finding the Fourth Proportional to 913.03, 1,259.89 and 540.02

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Solution

The fourth proportional to 913.03, 1,259.89 and 540.02 is: 745.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.03 : 1,259.89 = 540.02 : x
  2. Step 2: Convert to fraction form
    913.03/1,259.89 = 540.02/x
  3. Step 3: Cross multiply
    913.03x = 1,259.89 × 540.02
  4. Step 4: Simplify right side
    913.03x = 680,367.60
  5. Step 5: Solve for x
    x = 680,367.60/913.03
  6. Step 6: Final answer
    x = 745.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.