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Finding the Fourth Proportional to 288,628.05, 398,319.01 and 161,303.64

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Solution

The fourth proportional to 288,628.05, 398,319.01 and 161,303.64 is: 222,605.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,628.05 : 398,319.01 = 161,303.64 : x
  2. Step 2: Convert to fraction form
    288,628.05/398,319.01 = 161,303.64/x
  3. Step 3: Cross multiply
    288,628.05x = 398,319.01 × 161,303.64
  4. Step 4: Simplify right side
    288,628.05x = 64,250,306,194.20
  5. Step 5: Solve for x
    x = 64,250,306,194.20/288,628.05
  6. Step 6: Final answer
    x = 222,605.90

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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.