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Finding the Fourth Proportional to 297,311.40, 446,024.70 and 128,831.40

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Solution

The fourth proportional to 297,311.40, 446,024.70 and 128,831.40 is: 193,272.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,311.40 : 446,024.70 = 128,831.40 : x
  2. Step 2: Convert to fraction form
    297,311.40/446,024.70 = 128,831.40/x
  3. Step 3: Cross multiply
    297,311.40x = 446,024.70 × 128,831.40
  4. Step 4: Simplify right side
    297,311.40x = 57,461,986,535.58
  5. Step 5: Solve for x
    x = 57,461,986,535.58/297,311.40
  6. Step 6: Final answer
    x = 193,272.06

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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.