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Finding the Fourth Proportional to 1,048.80, 1,570.80 and 616.80

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Solution

The fourth proportional to 1,048.80, 1,570.80 and 616.80 is: 923.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.80 : 1,570.80 = 616.80 : x
  2. Step 2: Convert to fraction form
    1,048.80/1,570.80 = 616.80/x
  3. Step 3: Cross multiply
    1,048.80x = 1,570.80 × 616.80
  4. Step 4: Simplify right side
    1,048.80x = 968,869.44
  5. Step 5: Solve for x
    x = 968,869.44/1,048.80
  6. Step 6: Final answer
    x = 923.79

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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.