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Finding the Fourth Proportional to 438,015.40, 656,831.10 and 201,279.40

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Solution

The fourth proportional to 438,015.40, 656,831.10 and 201,279.40 is: 301,830.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,015.40 : 656,831.10 = 201,279.40 : x
  2. Step 2: Convert to fraction form
    438,015.40/656,831.10 = 201,279.40/x
  3. Step 3: Cross multiply
    438,015.40x = 656,831.10 × 201,279.40
  4. Step 4: Simplify right side
    438,015.40x = 132,206,569,709.34
  5. Step 5: Solve for x
    x = 132,206,569,709.34/438,015.40
  6. Step 6: Final answer
    x = 301,830.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.