Home / 1,289,978.64-1,780,125.12-709,197.54

Finding the Fourth Proportional to 1,289,978.64, 1,780,125.12 and 709,197.54

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Solution

The fourth proportional to 1,289,978.64, 1,780,125.12 and 709,197.54 is: 978,667.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,978.64 : 1,780,125.12 = 709,197.54 : x
  2. Step 2: Convert to fraction form
    1,289,978.64/1,780,125.12 = 709,197.54/x
  3. Step 3: Cross multiply
    1,289,978.64x = 1,780,125.12 × 709,197.54
  4. Step 4: Simplify right side
    1,289,978.64x = 1,262,460,355,996.20
  5. Step 5: Solve for x
    x = 1,262,460,355,996.20/1,289,978.64
  6. Step 6: Final answer
    x = 978,667.64

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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.