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Finding the Fourth Proportional to 907.15, 1,360.92 and 517.34

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Solution

The fourth proportional to 907.15, 1,360.92 and 517.34 is: 776.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.15 : 1,360.92 = 517.34 : x
  2. Step 2: Convert to fraction form
    907.15/1,360.92 = 517.34/x
  3. Step 3: Cross multiply
    907.15x = 1,360.92 × 517.34
  4. Step 4: Simplify right side
    907.15x = 704,053.13
  5. Step 5: Solve for x
    x = 704,053.13/907.15
  6. Step 6: Final answer
    x = 776.12

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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.