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Finding the Fourth Proportional to 1,571.40, 2,357.36 and 705.76

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Solution

The fourth proportional to 1,571.40, 2,357.36 and 705.76 is: 1,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.40 : 2,357.36 = 705.76 : x
  2. Step 2: Convert to fraction form
    1,571.40/2,357.36 = 705.76/x
  3. Step 3: Cross multiply
    1,571.40x = 2,357.36 × 705.76
  4. Step 4: Simplify right side
    1,571.40x = 1,663,730.39
  5. Step 5: Solve for x
    x = 1,663,730.39/1,571.40
  6. Step 6: Final answer
    x = 1,058.76

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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.