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Finding the Fourth Proportional to 985.46, 1,360.06 and 637.16

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Solution

The fourth proportional to 985.46, 1,360.06 and 637.16 is: 879.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.46 : 1,360.06 = 637.16 : x
  2. Step 2: Convert to fraction form
    985.46/1,360.06 = 637.16/x
  3. Step 3: Cross multiply
    985.46x = 1,360.06 × 637.16
  4. Step 4: Simplify right side
    985.46x = 866,575.83
  5. Step 5: Solve for x
    x = 866,575.83/985.46
  6. Step 6: Final answer
    x = 879.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.