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Finding the Fourth Proportional to 287,653.20, 431,479.80 and 235,165.20

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Solution

The fourth proportional to 287,653.20, 431,479.80 and 235,165.20 is: 352,747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,653.20 : 431,479.80 = 235,165.20 : x
  2. Step 2: Convert to fraction form
    287,653.20/431,479.80 = 235,165.20/x
  3. Step 3: Cross multiply
    287,653.20x = 431,479.80 × 235,165.20
  4. Step 4: Simplify right side
    287,653.20x = 101,469,033,462.96
  5. Step 5: Solve for x
    x = 101,469,033,462.96/287,653.20
  6. Step 6: Final answer
    x = 352,747.80

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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.