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Finding the Fourth Proportional to 372,391.29, 558,254.70 and 309,725.51

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Solution

The fourth proportional to 372,391.29, 558,254.70 and 309,725.51 is: 464,311.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,391.29 : 558,254.70 = 309,725.51 : x
  2. Step 2: Convert to fraction form
    372,391.29/558,254.70 = 309,725.51/x
  3. Step 3: Cross multiply
    372,391.29x = 558,254.70 × 309,725.51
  4. Step 4: Simplify right side
    372,391.29x = 172,905,718,876.12
  5. Step 5: Solve for x
    x = 172,905,718,876.12/372,391.29
  6. Step 6: Final answer
    x = 464,311.93

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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.