Home / 820,143.60-1,230,215.40-259,178.10

Finding the Fourth Proportional to 820,143.60, 1,230,215.40 and 259,178.10

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Solution

The fourth proportional to 820,143.60, 1,230,215.40 and 259,178.10 is: 388,767.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,143.60 : 1,230,215.40 = 259,178.10 : x
  2. Step 2: Convert to fraction form
    820,143.60/1,230,215.40 = 259,178.10/x
  3. Step 3: Cross multiply
    820,143.60x = 1,230,215.40 × 259,178.10
  4. Step 4: Simplify right side
    820,143.60x = 318,844,889,962.74
  5. Step 5: Solve for x
    x = 318,844,889,962.74/820,143.60
  6. Step 6: Final answer
    x = 388,767.15

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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.