Home / 386,390.80-579,519.78-102,084.40

Finding the Fourth Proportional to 386,390.80, 579,519.78 and 102,084.40

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Solution

The fourth proportional to 386,390.80, 579,519.78 and 102,084.40 is: 153,109.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,390.80 : 579,519.78 = 102,084.40 : x
  2. Step 2: Convert to fraction form
    386,390.80/579,519.78 = 102,084.40/x
  3. Step 3: Cross multiply
    386,390.80x = 579,519.78 × 102,084.40
  4. Step 4: Simplify right side
    386,390.80x = 59,159,929,029.43
  5. Step 5: Solve for x
    x = 59,159,929,029.43/386,390.80
  6. Step 6: Final answer
    x = 153,109.05

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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.