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Finding the Fourth Proportional to 626,137.84, 938,798.28 and 412,258.40

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Solution

The fourth proportional to 626,137.84, 938,798.28 and 412,258.40 is: 618,118.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,137.84 : 938,798.28 = 412,258.40 : x
  2. Step 2: Convert to fraction form
    626,137.84/938,798.28 = 412,258.40/x
  3. Step 3: Cross multiply
    626,137.84x = 938,798.28 × 412,258.40
  4. Step 4: Simplify right side
    626,137.84x = 387,027,476,835.55
  5. Step 5: Solve for x
    x = 387,027,476,835.55/626,137.84
  6. Step 6: Final answer
    x = 618,118.65

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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.