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Finding the Fourth Proportional to 290,308.57, 400,615.55 and 162,989.53

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Solution

The fourth proportional to 290,308.57, 400,615.55 and 162,989.53 is: 224,919.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,308.57 : 400,615.55 = 162,989.53 : x
  2. Step 2: Convert to fraction form
    290,308.57/400,615.55 = 162,989.53/x
  3. Step 3: Cross multiply
    290,308.57x = 400,615.55 × 162,989.53
  4. Step 4: Simplify right side
    290,308.57x = 65,296,139,390.24
  5. Step 5: Solve for x
    x = 65,296,139,390.24/290,308.57
  6. Step 6: Final answer
    x = 224,919.78

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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.