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Finding the Fourth Proportional to 889.68, 1,228.08 and 540.36

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Solution

The fourth proportional to 889.68, 1,228.08 and 540.36 is: 745.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.68 : 1,228.08 = 540.36 : x
  2. Step 2: Convert to fraction form
    889.68/1,228.08 = 540.36/x
  3. Step 3: Cross multiply
    889.68x = 1,228.08 × 540.36
  4. Step 4: Simplify right side
    889.68x = 663,605.31
  5. Step 5: Solve for x
    x = 663,605.31/889.68
  6. Step 6: Final answer
    x = 745.89

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1.5x scale

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.