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Finding the Fourth Proportional to 636,292.20, 878,083.78 and 349,817.16

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Solution

The fourth proportional to 636,292.20, 878,083.78 and 349,817.16 is: 482,747.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,292.20 : 878,083.78 = 349,817.16 : x
  2. Step 2: Convert to fraction form
    636,292.20/878,083.78 = 349,817.16/x
  3. Step 3: Cross multiply
    636,292.20x = 878,083.78 × 349,817.16
  4. Step 4: Simplify right side
    636,292.20x = 307,168,774,161.67
  5. Step 5: Solve for x
    x = 307,168,774,161.67/636,292.20
  6. Step 6: Final answer
    x = 482,747.98

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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.