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Finding the Fourth Proportional to 1,887.72, 2,831.58 and 589.20

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Solution

The fourth proportional to 1,887.72, 2,831.58 and 589.20 is: 883.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,887.72 : 2,831.58 = 589.20 : x
  2. Step 2: Convert to fraction form
    1,887.72/2,831.58 = 589.20/x
  3. Step 3: Cross multiply
    1,887.72x = 2,831.58 × 589.20
  4. Step 4: Simplify right side
    1,887.72x = 1,668,366.94
  5. Step 5: Solve for x
    x = 1,668,366.94/1,887.72
  6. Step 6: Final answer
    x = 883.80

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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.