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Finding the Fourth Proportional to 653,711.49, 901,862.43 and 378,018.39

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Solution

The fourth proportional to 653,711.49, 901,862.43 and 378,018.39 is: 521,515.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,711.49 : 901,862.43 = 378,018.39 : x
  2. Step 2: Convert to fraction form
    653,711.49/901,862.43 = 378,018.39/x
  3. Step 3: Cross multiply
    653,711.49x = 901,862.43 × 378,018.39
  4. Step 4: Simplify right side
    653,711.49x = 340,920,583,790.09
  5. Step 5: Solve for x
    x = 340,920,583,790.09/653,711.49
  6. Step 6: Final answer
    x = 521,515.36

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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.