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Finding the Fourth Proportional to 287,588.70, 431,383.05 and 236,850.30

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Solution

The fourth proportional to 287,588.70, 431,383.05 and 236,850.30 is: 355,275.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,588.70 : 431,383.05 = 236,850.30 : x
  2. Step 2: Convert to fraction form
    287,588.70/431,383.05 = 236,850.30/x
  3. Step 3: Cross multiply
    287,588.70x = 431,383.05 × 236,850.30
  4. Step 4: Simplify right side
    287,588.70x = 102,173,204,807.42
  5. Step 5: Solve for x
    x = 102,173,204,807.42/287,588.70
  6. Step 6: Final answer
    x = 355,275.45

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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.