Home / 1,520.40-2,281.08-943.68

Finding the Fourth Proportional to 1,520.40, 2,281.08 and 943.68

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Solution

The fourth proportional to 1,520.40, 2,281.08 and 943.68 is: 1,415.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.40 : 2,281.08 = 943.68 : x
  2. Step 2: Convert to fraction form
    1,520.40/2,281.08 = 943.68/x
  3. Step 3: Cross multiply
    1,520.40x = 2,281.08 × 943.68
  4. Step 4: Simplify right side
    1,520.40x = 2,152,609.57
  5. Step 5: Solve for x
    x = 2,152,609.57/1,520.40
  6. Step 6: Final answer
    x = 1,415.82

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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.