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Finding the Fourth Proportional to 548,731.32, 757,278.66 and 306,999.48

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Solution

The fourth proportional to 548,731.32, 757,278.66 and 306,999.48 is: 423,675.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,731.32 : 757,278.66 = 306,999.48 : x
  2. Step 2: Convert to fraction form
    548,731.32/757,278.66 = 306,999.48/x
  3. Step 3: Cross multiply
    548,731.32x = 757,278.66 × 306,999.48
  4. Step 4: Simplify right side
    548,731.32x = 232,484,154,835.10
  5. Step 5: Solve for x
    x = 232,484,154,835.10/548,731.32
  6. Step 6: Final answer
    x = 423,675.75

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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.