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Finding the Fourth Proportional to 975.44, 1,463.16 and 612.56

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Solution

The fourth proportional to 975.44, 1,463.16 and 612.56 is: 918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.44 : 1,463.16 = 612.56 : x
  2. Step 2: Convert to fraction form
    975.44/1,463.16 = 612.56/x
  3. Step 3: Cross multiply
    975.44x = 1,463.16 × 612.56
  4. Step 4: Simplify right side
    975.44x = 896,273.29
  5. Step 5: Solve for x
    x = 896,273.29/975.44
  6. Step 6: Final answer
    x = 918.84

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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.