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Finding the Fourth Proportional to 1,047.67, 1,571.46 and 278.17

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Solution

The fourth proportional to 1,047.67, 1,571.46 and 278.17 is: 417.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.67 : 1,571.46 = 278.17 : x
  2. Step 2: Convert to fraction form
    1,047.67/1,571.46 = 278.17/x
  3. Step 3: Cross multiply
    1,047.67x = 1,571.46 × 278.17
  4. Step 4: Simplify right side
    1,047.67x = 437,133.03
  5. Step 5: Solve for x
    x = 437,133.03/1,047.67
  6. Step 6: Final answer
    x = 417.24

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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.