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Finding the Fourth Proportional to 1,551.74, 2,140.79 and 888.23

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Solution

The fourth proportional to 1,551.74, 2,140.79 and 888.23 is: 1,225.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.74 : 2,140.79 = 888.23 : x
  2. Step 2: Convert to fraction form
    1,551.74/2,140.79 = 888.23/x
  3. Step 3: Cross multiply
    1,551.74x = 2,140.79 × 888.23
  4. Step 4: Simplify right side
    1,551.74x = 1,901,509.46
  5. Step 5: Solve for x
    x = 1,901,509.46/1,551.74
  6. Step 6: Final answer
    x = 1,225.41

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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.