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Finding the Fourth Proportional to 288,636.69, 398,319.20 and 161,312.28

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Solution

The fourth proportional to 288,636.69, 398,319.20 and 161,312.28 is: 222,611.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,636.69 : 398,319.20 = 161,312.28 : x
  2. Step 2: Convert to fraction form
    288,636.69/398,319.20 = 161,312.28/x
  3. Step 3: Cross multiply
    288,636.69x = 398,319.20 × 161,312.28
  4. Step 4: Simplify right side
    288,636.69x = 64,253,778,319.78
  5. Step 5: Solve for x
    x = 64,253,778,319.78/288,636.69
  6. Step 6: Final answer
    x = 222,611.26

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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.