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Finding the Fourth Proportional to 1,374.36, 2,061.50 and 552.40

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Solution

The fourth proportional to 1,374.36, 2,061.50 and 552.40 is: 828.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.36 : 2,061.50 = 552.40 : x
  2. Step 2: Convert to fraction form
    1,374.36/2,061.50 = 552.40/x
  3. Step 3: Cross multiply
    1,374.36x = 2,061.50 × 552.40
  4. Step 4: Simplify right side
    1,374.36x = 1,138,772.60
  5. Step 5: Solve for x
    x = 1,138,772.60/1,374.36
  6. Step 6: Final answer
    x = 828.58

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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.