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Finding the Fourth Proportional to 290,479.84, 400,899.69 and 163,155.43

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Solution

The fourth proportional to 290,479.84, 400,899.69 and 163,155.43 is: 225,175.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,479.84 : 400,899.69 = 163,155.43 : x
  2. Step 2: Convert to fraction form
    290,479.84/400,899.69 = 163,155.43/x
  3. Step 3: Cross multiply
    290,479.84x = 400,899.69 × 163,155.43
  4. Step 4: Simplify right side
    290,479.84x = 65,408,961,809.94
  5. Step 5: Solve for x
    x = 65,408,961,809.94/290,479.84
  6. Step 6: Final answer
    x = 225,175.57

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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.