Home / 921,491.64-1,271,732.40-513,725.49

Finding the Fourth Proportional to 921,491.64, 1,271,732.40 and 513,725.49

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Solution

The fourth proportional to 921,491.64, 1,271,732.40 and 513,725.49 is: 708,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,491.64 : 1,271,732.40 = 513,725.49 : x
  2. Step 2: Convert to fraction form
    921,491.64/1,271,732.40 = 513,725.49/x
  3. Step 3: Cross multiply
    921,491.64x = 1,271,732.40 × 513,725.49
  4. Step 4: Simplify right side
    921,491.64x = 653,321,350,338.88
  5. Step 5: Solve for x
    x = 653,321,350,338.88/921,491.64
  6. Step 6: Final answer
    x = 708,982.40

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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.