Home / 851,981.40-1,279,008.90-431,040.60

Finding the Fourth Proportional to 851,981.40, 1,279,008.90 and 431,040.60

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Solution

The fourth proportional to 851,981.40, 1,279,008.90 and 431,040.60 is: 647,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,981.40 : 1,279,008.90 = 431,040.60 : x
  2. Step 2: Convert to fraction form
    851,981.40/1,279,008.90 = 431,040.60/x
  3. Step 3: Cross multiply
    851,981.40x = 1,279,008.90 × 431,040.60
  4. Step 4: Simplify right side
    851,981.40x = 551,304,763,661.34
  5. Step 5: Solve for x
    x = 551,304,763,661.34/851,981.40
  6. Step 6: Final answer
    x = 647,085.45

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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.