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Finding the Fourth Proportional to 1,860,978.92, 2,569,126.48 and 1,252,331.96

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Solution

The fourth proportional to 1,860,978.92, 2,569,126.48 and 1,252,331.96 is: 1,728,874.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860,978.92 : 2,569,126.48 = 1,252,331.96 : x
  2. Step 2: Convert to fraction form
    1,860,978.92/2,569,126.48 = 1,252,331.96/x
  3. Step 3: Cross multiply
    1,860,978.92x = 2,569,126.48 × 1,252,331.96
  4. Step 4: Simplify right side
    1,860,978.92x = 3,217,399,184,209.84
  5. Step 5: Solve for x
    x = 3,217,399,184,209.84/1,860,978.92
  6. Step 6: Final answer
    x = 1,728,874.60

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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.