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Finding the Fourth Proportional to 640,338.66, 883,701.36 and 368,447.85

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Solution

The fourth proportional to 640,338.66, 883,701.36 and 368,447.85 is: 508,477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,338.66 : 883,701.36 = 368,447.85 : x
  2. Step 2: Convert to fraction form
    640,338.66/883,701.36 = 368,447.85/x
  3. Step 3: Cross multiply
    640,338.66x = 883,701.36 × 368,447.85
  4. Step 4: Simplify right side
    640,338.66x = 325,597,866,134.08
  5. Step 5: Solve for x
    x = 325,597,866,134.08/640,338.66
  6. Step 6: Final answer
    x = 508,477.60

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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.