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Finding the Fourth Proportional to 1,201.56, 1,803.06 and 432.12

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Solution

The fourth proportional to 1,201.56, 1,803.06 and 432.12 is: 648.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.56 : 1,803.06 = 432.12 : x
  2. Step 2: Convert to fraction form
    1,201.56/1,803.06 = 432.12/x
  3. Step 3: Cross multiply
    1,201.56x = 1,803.06 × 432.12
  4. Step 4: Simplify right side
    1,201.56x = 779,138.29
  5. Step 5: Solve for x
    x = 779,138.29/1,201.56
  6. Step 6: Final answer
    x = 648.44

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1.5x scale

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.