Home / 820,121.20-1,230,181.80-618,042.40

Finding the Fourth Proportional to 820,121.20, 1,230,181.80 and 618,042.40

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Solution

The fourth proportional to 820,121.20, 1,230,181.80 and 618,042.40 is: 927,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,121.20 : 1,230,181.80 = 618,042.40 : x
  2. Step 2: Convert to fraction form
    820,121.20/1,230,181.80 = 618,042.40/x
  3. Step 3: Cross multiply
    820,121.20x = 1,230,181.80 × 618,042.40
  4. Step 4: Simplify right side
    820,121.20x = 760,304,512,108.32
  5. Step 5: Solve for x
    x = 760,304,512,108.32/820,121.20
  6. Step 6: Final answer
    x = 927,063.60

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1.5x scale

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.