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Finding the Fourth Proportional to 641,782.16, 885,625.70 and 351,338.04

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Solution

The fourth proportional to 641,782.16, 885,625.70 and 351,338.04 is: 484,828.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,782.16 : 885,625.70 = 351,338.04 : x
  2. Step 2: Convert to fraction form
    641,782.16/885,625.70 = 351,338.04/x
  3. Step 3: Cross multiply
    641,782.16x = 885,625.70 × 351,338.04
  4. Step 4: Simplify right side
    641,782.16x = 311,153,997,611.63
  5. Step 5: Solve for x
    x = 311,153,997,611.63/641,782.16
  6. Step 6: Final answer
    x = 484,828.06

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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.