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Finding the Fourth Proportional to 1,048.39, 1,572.42 and 355.05

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Solution

The fourth proportional to 1,048.39, 1,572.42 and 355.05 is: 532.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.39 : 1,572.42 = 355.05 : x
  2. Step 2: Convert to fraction form
    1,048.39/1,572.42 = 355.05/x
  3. Step 3: Cross multiply
    1,048.39x = 1,572.42 × 355.05
  4. Step 4: Simplify right side
    1,048.39x = 558,287.72
  5. Step 5: Solve for x
    x = 558,287.72/1,048.39
  6. Step 6: Final answer
    x = 532.52

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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.