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Finding the Fourth Proportional to 386,881.65, 579,830.40 and 344,563.20

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Solution

The fourth proportional to 386,881.65, 579,830.40 and 344,563.20 is: 516,406.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,881.65 : 579,830.40 = 344,563.20 : x
  2. Step 2: Convert to fraction form
    386,881.65/579,830.40 = 344,563.20/x
  3. Step 3: Cross multiply
    386,881.65x = 579,830.40 × 344,563.20
  4. Step 4: Simplify right side
    386,881.65x = 199,788,218,081.28
  5. Step 5: Solve for x
    x = 199,788,218,081.28/386,881.65
  6. Step 6: Final answer
    x = 516,406.55

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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.