Home / 1,250.15-1,875.36-428.27

Finding the Fourth Proportional to 1,250.15, 1,875.36 and 428.27

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Solution

The fourth proportional to 1,250.15, 1,875.36 and 428.27 is: 642.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.15 : 1,875.36 = 428.27 : x
  2. Step 2: Convert to fraction form
    1,250.15/1,875.36 = 428.27/x
  3. Step 3: Cross multiply
    1,250.15x = 1,875.36 × 428.27
  4. Step 4: Simplify right side
    1,250.15x = 803,151.05
  5. Step 5: Solve for x
    x = 803,151.05/1,250.15
  6. Step 6: Final answer
    x = 642.45

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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.