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Finding the Fourth Proportional to 518,648.40, 777,972.60 and 413,672.40

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Solution

The fourth proportional to 518,648.40, 777,972.60 and 413,672.40 is: 620,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,648.40 : 777,972.60 = 413,672.40 : x
  2. Step 2: Convert to fraction form
    518,648.40/777,972.60 = 413,672.40/x
  3. Step 3: Cross multiply
    518,648.40x = 777,972.60 × 413,672.40
  4. Step 4: Simplify right side
    518,648.40x = 321,825,792,576.24
  5. Step 5: Solve for x
    x = 321,825,792,576.24/518,648.40
  6. Step 6: Final answer
    x = 620,508.60

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1.5x scale

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.