Home / 2,875.20-3,966.30-1,929.76

Finding the Fourth Proportional to 2,875.20, 3,966.30 and 1,929.76

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Solution

The fourth proportional to 2,875.20, 3,966.30 and 1,929.76 is: 2,662.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.20 : 3,966.30 = 1,929.76 : x
  2. Step 2: Convert to fraction form
    2,875.20/3,966.30 = 1,929.76/x
  3. Step 3: Cross multiply
    2,875.20x = 3,966.30 × 1,929.76
  4. Step 4: Simplify right side
    2,875.20x = 7,653,997.17
  5. Step 5: Solve for x
    x = 7,653,997.17/2,875.20
  6. Step 6: Final answer
    x = 2,662.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.