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Finding the Fourth Proportional to 331,391.51, 457,320.30 and 180,488.51

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Solution

The fourth proportional to 331,391.51, 457,320.30 and 180,488.51 is: 249,074.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,391.51 : 457,320.30 = 180,488.51 : x
  2. Step 2: Convert to fraction form
    331,391.51/457,320.30 = 180,488.51/x
  3. Step 3: Cross multiply
    331,391.51x = 457,320.30 × 180,488.51
  4. Step 4: Simplify right side
    331,391.51x = 82,541,059,539.75
  5. Step 5: Solve for x
    x = 82,541,059,539.75/331,391.51
  6. Step 6: Final answer
    x = 249,074.15

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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.