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Finding the Fourth Proportional to 287,880.30, 397,256.90 and 158,820.44

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Solution

The fourth proportional to 287,880.30, 397,256.90 and 158,820.44 is: 219,162.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,880.30 : 397,256.90 = 158,820.44 : x
  2. Step 2: Convert to fraction form
    287,880.30/397,256.90 = 158,820.44/x
  3. Step 3: Cross multiply
    287,880.30x = 397,256.90 × 158,820.44
  4. Step 4: Simplify right side
    287,880.30x = 63,092,512,870.65
  5. Step 5: Solve for x
    x = 63,092,512,870.65/287,880.30
  6. Step 6: Final answer
    x = 219,162.31

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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.