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Finding the Fourth Proportional to 1,888.64, 2,831.86 and 572.00

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Solution

The fourth proportional to 1,888.64, 2,831.86 and 572.00 is: 857.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888.64 : 2,831.86 = 572.00 : x
  2. Step 2: Convert to fraction form
    1,888.64/2,831.86 = 572.00/x
  3. Step 3: Cross multiply
    1,888.64x = 2,831.86 × 572.00
  4. Step 4: Simplify right side
    1,888.64x = 1,619,829.57
  5. Step 5: Solve for x
    x = 1,619,829.57/1,888.64
  6. Step 6: Final answer
    x = 857.67

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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.