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Finding the Fourth Proportional to 687,624, 1,031,435.07 and 261,159

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Solution

The fourth proportional to 687,624, 1,031,435.07 and 261,159 is: 391,738.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,624 : 1,031,435.07 = 261,159 : x
  2. Step 2: Convert to fraction form
    687,624/1,031,435.07 = 261,159/x
  3. Step 3: Cross multiply
    687,624x = 1,031,435.07 × 261,159
  4. Step 4: Simplify right side
    687,624x = 269,368,551,446.13
  5. Step 5: Solve for x
    x = 269,368,551,446.13/687,624
  6. Step 6: Final answer
    x = 391,738.15

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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.