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Finding the Fourth Proportional to 1,568.40, 2,351.70 and 472.56

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Solution

The fourth proportional to 1,568.40, 2,351.70 and 472.56 is: 708.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.40 : 2,351.70 = 472.56 : x
  2. Step 2: Convert to fraction form
    1,568.40/2,351.70 = 472.56/x
  3. Step 3: Cross multiply
    1,568.40x = 2,351.70 × 472.56
  4. Step 4: Simplify right side
    1,568.40x = 1,111,319.35
  5. Step 5: Solve for x
    x = 1,111,319.35/1,568.40
  6. Step 6: Final answer
    x = 708.57

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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.