Home / 1,931.85-2,900.21-1,285.47

Finding the Fourth Proportional to 1,931.85, 2,900.21 and 1,285.47

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Solution

The fourth proportional to 1,931.85, 2,900.21 and 1,285.47 is: 1,929.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.85 : 2,900.21 = 1,285.47 : x
  2. Step 2: Convert to fraction form
    1,931.85/2,900.21 = 1,285.47/x
  3. Step 3: Cross multiply
    1,931.85x = 2,900.21 × 1,285.47
  4. Step 4: Simplify right side
    1,931.85x = 3,728,126.52
  5. Step 5: Solve for x
    x = 3,728,126.52/1,931.85
  6. Step 6: Final answer
    x = 1,929.82

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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.