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Finding the Fourth Proportional to 907.36, 1,360.60 and 542.05

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Solution

The fourth proportional to 907.36, 1,360.60 and 542.05 is: 812.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.36 : 1,360.60 = 542.05 : x
  2. Step 2: Convert to fraction form
    907.36/1,360.60 = 542.05/x
  3. Step 3: Cross multiply
    907.36x = 1,360.60 × 542.05
  4. Step 4: Simplify right side
    907.36x = 737,508.47
  5. Step 5: Solve for x
    x = 737,508.47/907.36
  6. Step 6: Final answer
    x = 812.81

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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.