Home / 642,324.50-886,439.45-355,845.72

Finding the Fourth Proportional to 642,324.50, 886,439.45 and 355,845.72

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Solution

The fourth proportional to 642,324.50, 886,439.45 and 355,845.72 is: 491,084.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,324.50 : 886,439.45 = 355,845.72 : x
  2. Step 2: Convert to fraction form
    642,324.50/886,439.45 = 355,845.72/x
  3. Step 3: Cross multiply
    642,324.50x = 886,439.45 × 355,845.72
  4. Step 4: Simplify right side
    642,324.50x = 315,435,686,533.78
  5. Step 5: Solve for x
    x = 315,435,686,533.78/642,324.50
  6. Step 6: Final answer
    x = 491,084.63

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1.5x scale

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.