Home / 1,426.72-2,140.48-561.28

Finding the Fourth Proportional to 1,426.72, 2,140.48 and 561.28

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Solution

The fourth proportional to 1,426.72, 2,140.48 and 561.28 is: 842.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.72 : 2,140.48 = 561.28 : x
  2. Step 2: Convert to fraction form
    1,426.72/2,140.48 = 561.28/x
  3. Step 3: Cross multiply
    1,426.72x = 2,140.48 × 561.28
  4. Step 4: Simplify right side
    1,426.72x = 1,201,408.61
  5. Step 5: Solve for x
    x = 1,201,408.61/1,426.72
  6. Step 6: Final answer
    x = 842.08

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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.