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Finding the Fourth Proportional to 860,785, 1,291,384.86 and 269,809

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Solution

The fourth proportional to 860,785, 1,291,384.86 and 269,809 is: 404,778.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,785 : 1,291,384.86 = 269,809 : x
  2. Step 2: Convert to fraction form
    860,785/1,291,384.86 = 269,809/x
  3. Step 3: Cross multiply
    860,785x = 1,291,384.86 × 269,809
  4. Step 4: Simplify right side
    860,785x = 348,427,257,691.74
  5. Step 5: Solve for x
    x = 348,427,257,691.74/860,785
  6. Step 6: Final answer
    x = 404,778.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.