Home / 1,380.96-2,071.54-407.10

Finding the Fourth Proportional to 1,380.96, 2,071.54 and 407.10

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Solution

The fourth proportional to 1,380.96, 2,071.54 and 407.10 is: 610.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.96 : 2,071.54 = 407.10 : x
  2. Step 2: Convert to fraction form
    1,380.96/2,071.54 = 407.10/x
  3. Step 3: Cross multiply
    1,380.96x = 2,071.54 × 407.10
  4. Step 4: Simplify right side
    1,380.96x = 843,332.21
  5. Step 5: Solve for x
    x = 843,332.21/1,380.96
  6. Step 6: Final answer
    x = 610.69

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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.