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Finding the Fourth Proportional to 290,460.96, 400,831.20 and 163,128.96

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Solution

The fourth proportional to 290,460.96, 400,831.20 and 163,128.96 is: 225,115.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,460.96 : 400,831.20 = 163,128.96 : x
  2. Step 2: Convert to fraction form
    290,460.96/400,831.20 = 163,128.96/x
  3. Step 3: Cross multiply
    290,460.96x = 400,831.20 × 163,128.96
  4. Step 4: Simplify right side
    290,460.96x = 65,387,176,791.55
  5. Step 5: Solve for x
    x = 65,387,176,791.55/290,460.96
  6. Step 6: Final answer
    x = 225,115.20

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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.