Home / 1,254.36-1,881.78-421.31

Finding the Fourth Proportional to 1,254.36, 1,881.78 and 421.31

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Solution

The fourth proportional to 1,254.36, 1,881.78 and 421.31 is: 632.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.36 : 1,881.78 = 421.31 : x
  2. Step 2: Convert to fraction form
    1,254.36/1,881.78 = 421.31/x
  3. Step 3: Cross multiply
    1,254.36x = 1,881.78 × 421.31
  4. Step 4: Simplify right side
    1,254.36x = 792,803.32
  5. Step 5: Solve for x
    x = 792,803.32/1,254.36
  6. Step 6: Final answer
    x = 632.04

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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.