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Finding the Fourth Proportional to 638,564.60, 881,240.41 and 380,406.26

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Solution

The fourth proportional to 638,564.60, 881,240.41 and 380,406.26 is: 524,973.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,564.60 : 881,240.41 = 380,406.26 : x
  2. Step 2: Convert to fraction form
    638,564.60/881,240.41 = 380,406.26/x
  3. Step 3: Cross multiply
    638,564.60x = 881,240.41 × 380,406.26
  4. Step 4: Simplify right side
    638,564.60x = 335,229,371,207.58
  5. Step 5: Solve for x
    x = 335,229,371,207.58/638,564.60
  6. Step 6: Final answer
    x = 524,973.31

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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.