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Finding the Fourth Proportional to 995.80, 1,373.98 and 602.81

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Solution

The fourth proportional to 995.80, 1,373.98 and 602.81 is: 831.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.80 : 1,373.98 = 602.81 : x
  2. Step 2: Convert to fraction form
    995.80/1,373.98 = 602.81/x
  3. Step 3: Cross multiply
    995.80x = 1,373.98 × 602.81
  4. Step 4: Simplify right side
    995.80x = 828,248.88
  5. Step 5: Solve for x
    x = 828,248.88/995.80
  6. Step 6: Final answer
    x = 831.75

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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.