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Finding the Fourth Proportional to 999,309.78, 1,379,013.12 and 569,728.26

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Solution

The fourth proportional to 999,309.78, 1,379,013.12 and 569,728.26 is: 786,205.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,309.78 : 1,379,013.12 = 569,728.26 : x
  2. Step 2: Convert to fraction form
    999,309.78/1,379,013.12 = 569,728.26/x
  3. Step 3: Cross multiply
    999,309.78x = 1,379,013.12 × 569,728.26
  4. Step 4: Simplify right side
    999,309.78x = 785,662,745,374.77
  5. Step 5: Solve for x
    x = 785,662,745,374.77/999,309.78
  6. Step 6: Final answer
    x = 786,205.40

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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.