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Finding the Fourth Proportional to 290,319.45, 400,630.54 and 163,000.41

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Solution

The fourth proportional to 290,319.45, 400,630.54 and 163,000.41 is: 224,934.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,319.45 : 400,630.54 = 163,000.41 : x
  2. Step 2: Convert to fraction form
    290,319.45/400,630.54 = 163,000.41/x
  3. Step 3: Cross multiply
    290,319.45x = 400,630.54 × 163,000.41
  4. Step 4: Simplify right side
    290,319.45x = 65,302,942,278.52
  5. Step 5: Solve for x
    x = 65,302,942,278.52/290,319.45
  6. Step 6: Final answer
    x = 224,934.78

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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.