Home / 639,106.90-882,287.12-397,467.31

Finding the Fourth Proportional to 639,106.90, 882,287.12 and 397,467.31

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Solution

The fourth proportional to 639,106.90, 882,287.12 and 397,467.31 is: 548,703.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,106.90 : 882,287.12 = 397,467.31 : x
  2. Step 2: Convert to fraction form
    639,106.90/882,287.12 = 397,467.31/x
  3. Step 3: Cross multiply
    639,106.90x = 882,287.12 × 397,467.31
  4. Step 4: Simplify right side
    639,106.90x = 350,680,286,246.71
  5. Step 5: Solve for x
    x = 350,680,286,246.71/639,106.90
  6. Step 6: Final answer
    x = 548,703.65

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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.