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Finding the Fourth Proportional to 391,016.69, 586,939.79 and 346,328.15

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Solution

The fourth proportional to 391,016.69, 586,939.79 and 346,328.15 is: 519,859.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,016.69 : 586,939.79 = 346,328.15 : x
  2. Step 2: Convert to fraction form
    391,016.69/586,939.79 = 346,328.15/x
  3. Step 3: Cross multiply
    391,016.69x = 586,939.79 × 346,328.15
  4. Step 4: Simplify right side
    391,016.69x = 203,273,771,632.09
  5. Step 5: Solve for x
    x = 203,273,771,632.09/391,016.69
  6. Step 6: Final answer
    x = 519,859.58

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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.