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Finding the Fourth Proportional to 689,107.50, 950,968.35 and 387,301.50

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Solution

The fourth proportional to 689,107.50, 950,968.35 and 387,301.50 is: 534,476.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,107.50 : 950,968.35 = 387,301.50 : x
  2. Step 2: Convert to fraction form
    689,107.50/950,968.35 = 387,301.50/x
  3. Step 3: Cross multiply
    689,107.50x = 950,968.35 × 387,301.50
  4. Step 4: Simplify right side
    689,107.50x = 368,311,468,407.53
  5. Step 5: Solve for x
    x = 368,311,468,407.53/689,107.50
  6. Step 6: Final answer
    x = 534,476.07

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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.