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Finding the Fourth Proportional to 720,554.91, 994,348.53 and 393,853.35

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Solution

The fourth proportional to 720,554.91, 994,348.53 and 393,853.35 is: 543,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,554.91 : 994,348.53 = 393,853.35 : x
  2. Step 2: Convert to fraction form
    720,554.91/994,348.53 = 393,853.35/x
  3. Step 3: Cross multiply
    720,554.91x = 994,348.53 × 393,853.35
  4. Step 4: Simplify right side
    720,554.91x = 391,627,499,608.08
  5. Step 5: Solve for x
    x = 391,627,499,608.08/720,554.91
  6. Step 6: Final answer
    x = 543,508.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.