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Finding the Fourth Proportional to 986.16, 1,361.04 and 593.40

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Solution

The fourth proportional to 986.16, 1,361.04 and 593.40 is: 818.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.16 : 1,361.04 = 593.40 : x
  2. Step 2: Convert to fraction form
    986.16/1,361.04 = 593.40/x
  3. Step 3: Cross multiply
    986.16x = 1,361.04 × 593.40
  4. Step 4: Simplify right side
    986.16x = 807,641.14
  5. Step 5: Solve for x
    x = 807,641.14/986.16
  6. Step 6: Final answer
    x = 818.98

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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.