Home / 679,909.40-1,020,009.90-206,642.60

Finding the Fourth Proportional to 679,909.40, 1,020,009.90 and 206,642.60

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Solution

The fourth proportional to 679,909.40, 1,020,009.90 and 206,642.60 is: 310,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,909.40 : 1,020,009.90 = 206,642.60 : x
  2. Step 2: Convert to fraction form
    679,909.40/1,020,009.90 = 206,642.60/x
  3. Step 3: Cross multiply
    679,909.40x = 1,020,009.90 × 206,642.60
  4. Step 4: Simplify right side
    679,909.40x = 210,777,497,761.74
  5. Step 5: Solve for x
    x = 210,777,497,761.74/679,909.40
  6. Step 6: Final answer
    x = 310,008.21

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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.