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Finding the Fourth Proportional to 2,655.40, 3,980.58 and 923.56

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Solution

The fourth proportional to 2,655.40, 3,980.58 and 923.56 is: 1,384.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.40 : 3,980.58 = 923.56 : x
  2. Step 2: Convert to fraction form
    2,655.40/3,980.58 = 923.56/x
  3. Step 3: Cross multiply
    2,655.40x = 3,980.58 × 923.56
  4. Step 4: Simplify right side
    2,655.40x = 3,676,304.46
  5. Step 5: Solve for x
    x = 3,676,304.46/2,655.40
  6. Step 6: Final answer
    x = 1,384.46

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1.5x scale

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.