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Finding the Fourth Proportional to 290,142.98, 400,426.08 and 162,819.08

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Solution

The fourth proportional to 290,142.98, 400,426.08 and 162,819.08 is: 224,706.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,142.98 : 400,426.08 = 162,819.08 : x
  2. Step 2: Convert to fraction form
    290,142.98/400,426.08 = 162,819.08/x
  3. Step 3: Cross multiply
    290,142.98x = 400,426.08 × 162,819.08
  4. Step 4: Simplify right side
    290,142.98x = 65,197,005,758.36
  5. Step 5: Solve for x
    x = 65,197,005,758.36/290,142.98
  6. Step 6: Final answer
    x = 224,706.47

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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.