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Finding the Fourth Proportional to 297,927.60, 446,639.64 and 129,320.40

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Solution

The fourth proportional to 297,927.60, 446,639.64 and 129,320.40 is: 193,871.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,927.60 : 446,639.64 = 129,320.40 : x
  2. Step 2: Convert to fraction form
    297,927.60/446,639.64 = 129,320.40/x
  3. Step 3: Cross multiply
    297,927.60x = 446,639.64 × 129,320.40
  4. Step 4: Simplify right side
    297,927.60x = 57,759,616,900.66
  5. Step 5: Solve for x
    x = 57,759,616,900.66/297,927.60
  6. Step 6: Final answer
    x = 193,871.32

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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.