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Finding the Fourth Proportional to 557,235.23, 768,969.80 and 315,540.75

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Solution

The fourth proportional to 557,235.23, 768,969.80 and 315,540.75 is: 435,437.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,235.23 : 768,969.80 = 315,540.75 : x
  2. Step 2: Convert to fraction form
    557,235.23/768,969.80 = 315,540.75/x
  3. Step 3: Cross multiply
    557,235.23x = 768,969.80 × 315,540.75
  4. Step 4: Simplify right side
    557,235.23x = 242,641,305,841.65
  5. Step 5: Solve for x
    x = 242,641,305,841.65/557,235.23
  6. Step 6: Final answer
    x = 435,437.85

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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.