Home / 642,186.38-886,217.21-355,725.02

Finding the Fourth Proportional to 642,186.38, 886,217.21 and 355,725.02

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Solution

The fourth proportional to 642,186.38, 886,217.21 and 355,725.02 is: 490,900.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,186.38 : 886,217.21 = 355,725.02 : x
  2. Step 2: Convert to fraction form
    642,186.38/886,217.21 = 355,725.02/x
  3. Step 3: Cross multiply
    642,186.38x = 886,217.21 × 355,725.02
  4. Step 4: Simplify right side
    642,186.38x = 315,249,628,541.88
  5. Step 5: Solve for x
    x = 315,249,628,541.88/642,186.38
  6. Step 6: Final answer
    x = 490,900.52

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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.