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Finding the Fourth Proportional to 638,267.36, 880,859.60 and 351,838.40

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Solution

The fourth proportional to 638,267.36, 880,859.60 and 351,838.40 is: 485,564.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,267.36 : 880,859.60 = 351,838.40 : x
  2. Step 2: Convert to fraction form
    638,267.36/880,859.60 = 351,838.40/x
  3. Step 3: Cross multiply
    638,267.36x = 880,859.60 × 351,838.40
  4. Step 4: Simplify right side
    638,267.36x = 309,920,232,288.64
  5. Step 5: Solve for x
    x = 309,920,232,288.64/638,267.36
  6. Step 6: Final answer
    x = 485,564.91

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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.