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Finding the Fourth Proportional to 840,798, 1,261,185.15 and 391,267.44

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Solution

The fourth proportional to 840,798, 1,261,185.15 and 391,267.44 is: 586,895.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,798 : 1,261,185.15 = 391,267.44 : x
  2. Step 2: Convert to fraction form
    840,798/1,261,185.15 = 391,267.44/x
  3. Step 3: Cross multiply
    840,798x = 1,261,185.15 × 391,267.44
  4. Step 4: Simplify right side
    840,798x = 493,460,686,473.77
  5. Step 5: Solve for x
    x = 493,460,686,473.77/840,798
  6. Step 6: Final answer
    x = 586,895.65

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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.