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Finding the Fourth Proportional to 1,571.52, 2,357.40 and 841.16

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Solution

The fourth proportional to 1,571.52, 2,357.40 and 841.16 is: 1,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.52 : 2,357.40 = 841.16 : x
  2. Step 2: Convert to fraction form
    1,571.52/2,357.40 = 841.16/x
  3. Step 3: Cross multiply
    1,571.52x = 2,357.40 × 841.16
  4. Step 4: Simplify right side
    1,571.52x = 1,982,950.58
  5. Step 5: Solve for x
    x = 1,982,950.58/1,571.52
  6. Step 6: Final answer
    x = 1,261.80

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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.