Home / 1,069,129.67-1,475,398.90-639,409.78

Finding the Fourth Proportional to 1,069,129.67, 1,475,398.90 and 639,409.78

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Solution

The fourth proportional to 1,069,129.67, 1,475,398.90 and 639,409.78 is: 882,385.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069,129.67 : 1,475,398.90 = 639,409.78 : x
  2. Step 2: Convert to fraction form
    1,069,129.67/1,475,398.90 = 639,409.78/x
  3. Step 3: Cross multiply
    1,069,129.67x = 1,475,398.90 × 639,409.78
  4. Step 4: Simplify right side
    1,069,129.67x = 943,384,488,704.75
  5. Step 5: Solve for x
    x = 943,384,488,704.75/1,069,129.67
  6. Step 6: Final answer
    x = 882,385.48

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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.