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Finding the Fourth Proportional to 287,756.62, 397,109.09 and 158,709.91

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Solution

The fourth proportional to 287,756.62, 397,109.09 and 158,709.91 is: 219,022.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,756.62 : 397,109.09 = 158,709.91 : x
  2. Step 2: Convert to fraction form
    287,756.62/397,109.09 = 158,709.91/x
  3. Step 3: Cross multiply
    287,756.62x = 397,109.09 × 158,709.91
  4. Step 4: Simplify right side
    287,756.62x = 63,025,147,934.08
  5. Step 5: Solve for x
    x = 63,025,147,934.08/287,756.62
  6. Step 6: Final answer
    x = 219,022.41

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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.