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Finding the Fourth Proportional to 287,767.20, 431,650.80 and 270,256.80

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Solution

The fourth proportional to 287,767.20, 431,650.80 and 270,256.80 is: 405,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,767.20 : 431,650.80 = 270,256.80 : x
  2. Step 2: Convert to fraction form
    287,767.20/431,650.80 = 270,256.80/x
  3. Step 3: Cross multiply
    287,767.20x = 431,650.80 × 270,256.80
  4. Step 4: Simplify right side
    287,767.20x = 116,656,563,925.44
  5. Step 5: Solve for x
    x = 116,656,563,925.44/287,767.20
  6. Step 6: Final answer
    x = 405,385.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.