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Finding the Fourth Proportional to 1,340.48, 2,011.02 and 474.78

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Solution

The fourth proportional to 1,340.48, 2,011.02 and 474.78 is: 712.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.48 : 2,011.02 = 474.78 : x
  2. Step 2: Convert to fraction form
    1,340.48/2,011.02 = 474.78/x
  3. Step 3: Cross multiply
    1,340.48x = 2,011.02 × 474.78
  4. Step 4: Simplify right side
    1,340.48x = 954,792.08
  5. Step 5: Solve for x
    x = 954,792.08/1,340.48
  6. Step 6: Final answer
    x = 712.28

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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.