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Finding the Fourth Proportional to 680,660.34, 937,285.45 and 665,556

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Solution

The fourth proportional to 680,660.34, 937,285.45 and 665,556 is: 916,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,660.34 : 937,285.45 = 665,556 : x
  2. Step 2: Convert to fraction form
    680,660.34/937,285.45 = 665,556/x
  3. Step 3: Cross multiply
    680,660.34x = 937,285.45 × 665,556
  4. Step 4: Simplify right side
    680,660.34x = 623,815,954,960.20
  5. Step 5: Solve for x
    x = 623,815,954,960.20/680,660.34
  6. Step 6: Final answer
    x = 916,486.42

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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.