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Finding the Fourth Proportional to 309,391.80, 464,088.10 and 84,754.21

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Solution

The fourth proportional to 309,391.80, 464,088.10 and 84,754.21 is: 127,131.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,391.80 : 464,088.10 = 84,754.21 : x
  2. Step 2: Convert to fraction form
    309,391.80/464,088.10 = 84,754.21/x
  3. Step 3: Cross multiply
    309,391.80x = 464,088.10 × 84,754.21
  4. Step 4: Simplify right side
    309,391.80x = 39,333,420,285.90
  5. Step 5: Solve for x
    x = 39,333,420,285.90/309,391.80
  6. Step 6: Final answer
    x = 127,131.42

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1.5x scale

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.