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Finding the Fourth Proportional to 297,128.80, 445,304.40 and 119,490.40

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Solution

The fourth proportional to 297,128.80, 445,304.40 and 119,490.40 is: 179,079.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,128.80 : 445,304.40 = 119,490.40 : x
  2. Step 2: Convert to fraction form
    297,128.80/445,304.40 = 119,490.40/x
  3. Step 3: Cross multiply
    297,128.80x = 445,304.40 × 119,490.40
  4. Step 4: Simplify right side
    297,128.80x = 53,209,600,877.76
  5. Step 5: Solve for x
    x = 53,209,600,877.76/297,128.80
  6. Step 6: Final answer
    x = 179,079.24

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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.