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Finding the Fourth Proportional to 555,440.20, 766,505.95 and 300,791.32

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Solution

The fourth proportional to 555,440.20, 766,505.95 and 300,791.32 is: 415,091.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,440.20 : 766,505.95 = 300,791.32 : x
  2. Step 2: Convert to fraction form
    555,440.20/766,505.95 = 300,791.32/x
  3. Step 3: Cross multiply
    555,440.20x = 766,505.95 × 300,791.32
  4. Step 4: Simplify right side
    555,440.20x = 230,558,336,488.35
  5. Step 5: Solve for x
    x = 230,558,336,488.35/555,440.20
  6. Step 6: Final answer
    x = 415,091.20

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1.5x scale

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.