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Finding the Fourth Proportional to 290,063.40, 400,329.12 and 161,031.48

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Solution

The fourth proportional to 290,063.40, 400,329.12 and 161,031.48 is: 222,246.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,063.40 : 400,329.12 = 161,031.48 : x
  2. Step 2: Convert to fraction form
    290,063.40/400,329.12 = 161,031.48/x
  3. Step 3: Cross multiply
    290,063.40x = 400,329.12 × 161,031.48
  4. Step 4: Simplify right side
    290,063.40x = 64,465,590,680.70
  5. Step 5: Solve for x
    x = 64,465,590,680.70/290,063.40
  6. Step 6: Final answer
    x = 222,246.55

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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.