Home / 1,215.47-1,821.72-474.39

Finding the Fourth Proportional to 1,215.47, 1,821.72 and 474.39

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Solution

The fourth proportional to 1,215.47, 1,821.72 and 474.39 is: 711.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.47 : 1,821.72 = 474.39 : x
  2. Step 2: Convert to fraction form
    1,215.47/1,821.72 = 474.39/x
  3. Step 3: Cross multiply
    1,215.47x = 1,821.72 × 474.39
  4. Step 4: Simplify right side
    1,215.47x = 864,205.75
  5. Step 5: Solve for x
    x = 864,205.75/1,215.47
  6. Step 6: Final answer
    x = 711.01

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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.