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Finding the Fourth Proportional to 290,469.58, 400,885.65 and 163,145.18

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Solution

The fourth proportional to 290,469.58, 400,885.65 and 163,145.18 is: 225,161.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,469.58 : 400,885.65 = 163,145.18 : x
  2. Step 2: Convert to fraction form
    290,469.58/400,885.65 = 163,145.18/x
  3. Step 3: Cross multiply
    290,469.58x = 400,885.65 × 163,145.18
  4. Step 4: Simplify right side
    290,469.58x = 65,402,562,530.88
  5. Step 5: Solve for x
    x = 65,402,562,530.88/290,469.58
  6. Step 6: Final answer
    x = 225,161.49

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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.