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Finding the Fourth Proportional to 636,208.19, 877,945 and 349,726.20

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Solution

The fourth proportional to 636,208.19, 877,945 and 349,726.20 is: 482,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,208.19 : 877,945 = 349,726.20 : x
  2. Step 2: Convert to fraction form
    636,208.19/877,945 = 349,726.20/x
  3. Step 3: Cross multiply
    636,208.19x = 877,945 × 349,726.20
  4. Step 4: Simplify right side
    636,208.19x = 307,040,368,659
  5. Step 5: Solve for x
    x = 307,040,368,659/636,208.19
  6. Step 6: Final answer
    x = 482,609.90

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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.