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Finding the Fourth Proportional to 636,112.70, 877,834.23 and 349,631.90

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Solution

The fourth proportional to 636,112.70, 877,834.23 and 349,631.90 is: 482,491.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,112.70 : 877,834.23 = 349,631.90 : x
  2. Step 2: Convert to fraction form
    636,112.70/877,834.23 = 349,631.90/x
  3. Step 3: Cross multiply
    636,112.70x = 877,834.23 × 349,631.90
  4. Step 4: Simplify right side
    636,112.70x = 306,918,849,719.94
  5. Step 5: Solve for x
    x = 306,918,849,719.94/636,112.70
  6. Step 6: Final answer
    x = 482,491.31

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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.