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Finding the Fourth Proportional to 641,855.34, 885,774.18 and 351,479.15

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Solution

The fourth proportional to 641,855.34, 885,774.18 and 351,479.15 is: 485,048.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,855.34 : 885,774.18 = 351,479.15 : x
  2. Step 2: Convert to fraction form
    641,855.34/885,774.18 = 351,479.15/x
  3. Step 3: Cross multiply
    641,855.34x = 885,774.18 × 351,479.15
  4. Step 4: Simplify right side
    641,855.34x = 311,331,156,089.18
  5. Step 5: Solve for x
    x = 311,331,156,089.18/641,855.34
  6. Step 6: Final answer
    x = 485,048.79

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1.5x scale

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.