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Finding the Fourth Proportional to 290,655.20, 401,057.52 and 163,330.40

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Solution

The fourth proportional to 290,655.20, 401,057.52 and 163,330.40 is: 225,369.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,655.20 : 401,057.52 = 163,330.40 : x
  2. Step 2: Convert to fraction form
    290,655.20/401,057.52 = 163,330.40/x
  3. Step 3: Cross multiply
    290,655.20x = 401,057.52 × 163,330.40
  4. Step 4: Simplify right side
    290,655.20x = 65,504,885,164.61
  5. Step 5: Solve for x
    x = 65,504,885,164.61/290,655.20
  6. Step 6: Final answer
    x = 225,369.73

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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.