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Finding the Fourth Proportional to 975.24, 1,460.16 and 685.80

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Solution

The fourth proportional to 975.24, 1,460.16 and 685.80 is: 1,026.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.24 : 1,460.16 = 685.80 : x
  2. Step 2: Convert to fraction form
    975.24/1,460.16 = 685.80/x
  3. Step 3: Cross multiply
    975.24x = 1,460.16 × 685.80
  4. Step 4: Simplify right side
    975.24x = 1,001,377.73
  5. Step 5: Solve for x
    x = 1,001,377.73/975.24
  6. Step 6: Final answer
    x = 1,026.80

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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.