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Finding the Fourth Proportional to 313,239.30, 432,046.94 and 287,480.82

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Solution

The fourth proportional to 313,239.30, 432,046.94 and 287,480.82 is: 396,518.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,239.30 : 432,046.94 = 287,480.82 : x
  2. Step 2: Convert to fraction form
    313,239.30/432,046.94 = 287,480.82/x
  3. Step 3: Cross multiply
    313,239.30x = 432,046.94 × 287,480.82
  4. Step 4: Simplify right side
    313,239.30x = 124,205,208,589.69
  5. Step 5: Solve for x
    x = 124,205,208,589.69/313,239.30
  6. Step 6: Final answer
    x = 396,518.60

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1.5x scale

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.