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Finding the Fourth Proportional to 1,888.64, 2,831.92 and 655.95

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Solution

The fourth proportional to 1,888.64, 2,831.92 and 655.95 is: 983.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888.64 : 2,831.92 = 655.95 : x
  2. Step 2: Convert to fraction form
    1,888.64/2,831.92 = 655.95/x
  3. Step 3: Cross multiply
    1,888.64x = 2,831.92 × 655.95
  4. Step 4: Simplify right side
    1,888.64x = 1,857,597.92
  5. Step 5: Solve for x
    x = 1,857,597.92/1,888.64
  6. Step 6: Final answer
    x = 983.56

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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.