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Finding the Fourth Proportional to 926.06, 1,388.29 and 515.31

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Solution

The fourth proportional to 926.06, 1,388.29 and 515.31 is: 772.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.06 : 1,388.29 = 515.31 : x
  2. Step 2: Convert to fraction form
    926.06/1,388.29 = 515.31/x
  3. Step 3: Cross multiply
    926.06x = 1,388.29 × 515.31
  4. Step 4: Simplify right side
    926.06x = 715,402.00
  5. Step 5: Solve for x
    x = 715,402.00/926.06
  6. Step 6: Final answer
    x = 772.52

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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.