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Finding the Fourth Proportional to 638,620.64, 881,277.28 and 352,140.64

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Solution

The fourth proportional to 638,620.64, 881,277.28 and 352,140.64 is: 485,943.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,620.64 : 881,277.28 = 352,140.64 : x
  2. Step 2: Convert to fraction form
    638,620.64/881,277.28 = 352,140.64/x
  3. Step 3: Cross multiply
    638,620.64x = 881,277.28 × 352,140.64
  4. Step 4: Simplify right side
    638,620.64x = 310,333,545,396.66
  5. Step 5: Solve for x
    x = 310,333,545,396.66/638,620.64
  6. Step 6: Final answer
    x = 485,943.49

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1.5x scale

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.