Home / 386,384.20-579,864.30-199,299.40

Finding the Fourth Proportional to 386,384.20, 579,864.30 and 199,299.40

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Solution

The fourth proportional to 386,384.20, 579,864.30 and 199,299.40 is: 299,097.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,384.20 : 579,864.30 = 199,299.40 : x
  2. Step 2: Convert to fraction form
    386,384.20/579,864.30 = 199,299.40/x
  3. Step 3: Cross multiply
    386,384.20x = 579,864.30 × 199,299.40
  4. Step 4: Simplify right side
    386,384.20x = 115,566,607,071.42
  5. Step 5: Solve for x
    x = 115,566,607,071.42/386,384.20
  6. Step 6: Final answer
    x = 299,097.65

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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.