Home / 212,810.20-319,215.30-209,699.80

Finding the Fourth Proportional to 212,810.20, 319,215.30 and 209,699.80

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Solution

The fourth proportional to 212,810.20, 319,215.30 and 209,699.80 is: 314,549.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,810.20 : 319,215.30 = 209,699.80 : x
  2. Step 2: Convert to fraction form
    212,810.20/319,215.30 = 209,699.80/x
  3. Step 3: Cross multiply
    212,810.20x = 319,215.30 × 209,699.80
  4. Step 4: Simplify right side
    212,810.20x = 66,939,384,566.94
  5. Step 5: Solve for x
    x = 66,939,384,566.94/212,810.20
  6. Step 6: Final answer
    x = 314,549.70

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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.