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Finding the Fourth Proportional to 548,722.40, 757,193.72 and 306,986

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Solution

The fourth proportional to 548,722.40, 757,193.72 and 306,986 is: 423,616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,722.40 : 757,193.72 = 306,986 : x
  2. Step 2: Convert to fraction form
    548,722.40/757,193.72 = 306,986/x
  3. Step 3: Cross multiply
    548,722.40x = 757,193.72 × 306,986
  4. Step 4: Simplify right side
    548,722.40x = 232,447,871,327.92
  5. Step 5: Solve for x
    x = 232,447,871,327.92/548,722.40
  6. Step 6: Final answer
    x = 423,616.52

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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.