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Finding the Fourth Proportional to 791,809.80, 1,187,714.70 and 658,840.20

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Solution

The fourth proportional to 791,809.80, 1,187,714.70 and 658,840.20 is: 988,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    791,809.80 : 1,187,714.70 = 658,840.20 : x
  2. Step 2: Convert to fraction form
    791,809.80/1,187,714.70 = 658,840.20/x
  3. Step 3: Cross multiply
    791,809.80x = 1,187,714.70 × 658,840.20
  4. Step 4: Simplify right side
    791,809.80x = 782,514,190,490.94
  5. Step 5: Solve for x
    x = 782,514,190,490.94/791,809.80
  6. Step 6: Final answer
    x = 988,260.30

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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.