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Finding the Fourth Proportional to 985.96, 1,360.80 and 593.04

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Solution

The fourth proportional to 985.96, 1,360.80 and 593.04 is: 818.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    985.96 : 1,360.80 = 593.04 : x
  2. Step 2: Convert to fraction form
    985.96/1,360.80 = 593.04/x
  3. Step 3: Cross multiply
    985.96x = 1,360.80 × 593.04
  4. Step 4: Simplify right side
    985.96x = 807,008.83
  5. Step 5: Solve for x
    x = 807,008.83/985.96
  6. Step 6: Final answer
    x = 818.50

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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.