Home / 1,289,985.64-1,780,134.78-709,204.54

Finding the Fourth Proportional to 1,289,985.64, 1,780,134.78 and 709,204.54

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Solution

The fourth proportional to 1,289,985.64, 1,780,134.78 and 709,204.54 is: 978,677.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,985.64 : 1,780,134.78 = 709,204.54 : x
  2. Step 2: Convert to fraction form
    1,289,985.64/1,780,134.78 = 709,204.54/x
  3. Step 3: Cross multiply
    1,289,985.64x = 1,780,134.78 × 709,204.54
  4. Step 4: Simplify right side
    1,289,985.64x = 1,262,479,667,787.90
  5. Step 5: Solve for x
    x = 1,262,479,667,787.90/1,289,985.64
  6. Step 6: Final answer
    x = 978,677.30

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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.