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Finding the Fourth Proportional to 287,736.20, 431,728.68 and 154,460.82

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Solution

The fourth proportional to 287,736.20, 431,728.68 and 154,460.82 is: 231,758.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,736.20 : 431,728.68 = 154,460.82 : x
  2. Step 2: Convert to fraction form
    287,736.20/431,728.68 = 154,460.82/x
  3. Step 3: Cross multiply
    287,736.20x = 431,728.68 × 154,460.82
  4. Step 4: Simplify right side
    287,736.20x = 66,685,168,128.53
  5. Step 5: Solve for x
    x = 66,685,168,128.53/287,736.20
  6. Step 6: Final answer
    x = 231,758.01

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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.