Home / 279,639.31-385,929.09-172,272.19

Finding the Fourth Proportional to 279,639.31, 385,929.09 and 172,272.19

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Solution

The fourth proportional to 279,639.31, 385,929.09 and 172,272.19 is: 237,752.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,639.31 : 385,929.09 = 172,272.19 : x
  2. Step 2: Convert to fraction form
    279,639.31/385,929.09 = 172,272.19/x
  3. Step 3: Cross multiply
    279,639.31x = 385,929.09 × 172,272.19
  4. Step 4: Simplify right side
    279,639.31x = 66,484,849,519.01
  5. Step 5: Solve for x
    x = 66,484,849,519.01/279,639.31
  6. Step 6: Final answer
    x = 237,752.16

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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.