Home / 1,271.04-1,905.32-490.43

Finding the Fourth Proportional to 1,271.04, 1,905.32 and 490.43

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Solution

The fourth proportional to 1,271.04, 1,905.32 and 490.43 is: 735.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.04 : 1,905.32 = 490.43 : x
  2. Step 2: Convert to fraction form
    1,271.04/1,905.32 = 490.43/x
  3. Step 3: Cross multiply
    1,271.04x = 1,905.32 × 490.43
  4. Step 4: Simplify right side
    1,271.04x = 934,414.11
  5. Step 5: Solve for x
    x = 934,414.11/1,271.04
  6. Step 6: Final answer
    x = 735.16

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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.