Home / 2,280.24-3,421.56-981.36

Finding the Fourth Proportional to 2,280.24, 3,421.56 and 981.36

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Solution

The fourth proportional to 2,280.24, 3,421.56 and 981.36 is: 1,472.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.24 : 3,421.56 = 981.36 : x
  2. Step 2: Convert to fraction form
    2,280.24/3,421.56 = 981.36/x
  3. Step 3: Cross multiply
    2,280.24x = 3,421.56 × 981.36
  4. Step 4: Simplify right side
    2,280.24x = 3,357,782.12
  5. Step 5: Solve for x
    x = 3,357,782.12/2,280.24
  6. Step 6: Final answer
    x = 1,472.56

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1.5x scale

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.