Home / 315,780.40-435,970.02-205,504.12

Finding the Fourth Proportional to 315,780.40, 435,970.02 and 205,504.12

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Solution

The fourth proportional to 315,780.40, 435,970.02 and 205,504.12 is: 283,721.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,780.40 : 435,970.02 = 205,504.12 : x
  2. Step 2: Convert to fraction form
    315,780.40/435,970.02 = 205,504.12/x
  3. Step 3: Cross multiply
    315,780.40x = 435,970.02 × 205,504.12
  4. Step 4: Simplify right side
    315,780.40x = 89,593,635,306.48
  5. Step 5: Solve for x
    x = 89,593,635,306.48/315,780.40
  6. Step 6: Final answer
    x = 283,721.33

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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.