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Finding the Fourth Proportional to 636,109.75, 877,820.13 and 349,629.76

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Solution

The fourth proportional to 636,109.75, 877,820.13 and 349,629.76 is: 482,482.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,109.75 : 877,820.13 = 349,629.76 : x
  2. Step 2: Convert to fraction form
    636,109.75/877,820.13 = 349,629.76/x
  3. Step 3: Cross multiply
    636,109.75x = 877,820.13 × 349,629.76
  4. Step 4: Simplify right side
    636,109.75x = 306,912,041,375.07
  5. Step 5: Solve for x
    x = 306,912,041,375.07/636,109.75
  6. Step 6: Final answer
    x = 482,482.84

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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.