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Finding the Fourth Proportional to 860,810.70, 1,291,216.05 and 261,767.10

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Solution

The fourth proportional to 860,810.70, 1,291,216.05 and 261,767.10 is: 392,650.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,810.70 : 1,291,216.05 = 261,767.10 : x
  2. Step 2: Convert to fraction form
    860,810.70/1,291,216.05 = 261,767.10/x
  3. Step 3: Cross multiply
    860,810.70x = 1,291,216.05 × 261,767.10
  4. Step 4: Simplify right side
    860,810.70x = 337,997,880,881.96
  5. Step 5: Solve for x
    x = 337,997,880,881.96/860,810.70
  6. Step 6: Final answer
    x = 392,650.65

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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.