Home / 1,929.12-2,657.44-1,808.16

Finding the Fourth Proportional to 1,929.12, 2,657.44 and 1,808.16

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Solution

The fourth proportional to 1,929.12, 2,657.44 and 1,808.16 is: 2,490.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.12 : 2,657.44 = 1,808.16 : x
  2. Step 2: Convert to fraction form
    1,929.12/2,657.44 = 1,808.16/x
  3. Step 3: Cross multiply
    1,929.12x = 2,657.44 × 1,808.16
  4. Step 4: Simplify right side
    1,929.12x = 4,805,076.71
  5. Step 5: Solve for x
    x = 4,805,076.71/1,929.12
  6. Step 6: Final answer
    x = 2,490.81

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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.