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Finding the Fourth Proportional to 391,579.04, 540,639.08 and 300,772.64

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Solution

The fourth proportional to 391,579.04, 540,639.08 and 300,772.64 is: 415,265.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,579.04 : 540,639.08 = 300,772.64 : x
  2. Step 2: Convert to fraction form
    391,579.04/540,639.08 = 300,772.64/x
  3. Step 3: Cross multiply
    391,579.04x = 540,639.08 × 300,772.64
  4. Step 4: Simplify right side
    391,579.04x = 162,609,443,378.77
  5. Step 5: Solve for x
    x = 162,609,443,378.77/391,579.04
  6. Step 6: Final answer
    x = 415,265.95

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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.