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Finding the Fourth Proportional to 638,763.77, 881,483.50 and 352,310.51

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Solution

The fourth proportional to 638,763.77, 881,483.50 and 352,310.51 is: 486,182.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,763.77 : 881,483.50 = 352,310.51 : x
  2. Step 2: Convert to fraction form
    638,763.77/881,483.50 = 352,310.51/x
  3. Step 3: Cross multiply
    638,763.77x = 881,483.50 × 352,310.51
  4. Step 4: Simplify right side
    638,763.77x = 310,555,901,441.59
  5. Step 5: Solve for x
    x = 310,555,901,441.59/638,763.77
  6. Step 6: Final answer
    x = 486,182.71

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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.