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Finding the Fourth Proportional to 919,967.90, 1,379,951.85 and 878,633.60

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Solution

The fourth proportional to 919,967.90, 1,379,951.85 and 878,633.60 is: 1,317,950.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,967.90 : 1,379,951.85 = 878,633.60 : x
  2. Step 2: Convert to fraction form
    919,967.90/1,379,951.85 = 878,633.60/x
  3. Step 3: Cross multiply
    919,967.90x = 1,379,951.85 × 878,633.60
  4. Step 4: Simplify right side
    919,967.90x = 1,212,472,061,792.16
  5. Step 5: Solve for x
    x = 1,212,472,061,792.16/919,967.90
  6. Step 6: Final answer
    x = 1,317,950.40

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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.