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Finding the Fourth Proportional to 680,661.34, 937,286.83 and 665,557

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Solution

The fourth proportional to 680,661.34, 937,286.83 and 665,557 is: 916,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,661.34 : 937,286.83 = 665,557 : x
  2. Step 2: Convert to fraction form
    680,661.34/937,286.83 = 665,557/x
  3. Step 3: Cross multiply
    680,661.34x = 937,286.83 × 665,557
  4. Step 4: Simplify right side
    680,661.34x = 623,817,810,714.31
  5. Step 5: Solve for x
    x = 623,817,810,714.31/680,661.34
  6. Step 6: Final answer
    x = 916,487.80

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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.