Home / 215,931.58-321,681.23-206,216.21

Finding the Fourth Proportional to 215,931.58, 321,681.23 and 206,216.21

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Solution

The fourth proportional to 215,931.58, 321,681.23 and 206,216.21 is: 307,207.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,931.58 : 321,681.23 = 206,216.21 : x
  2. Step 2: Convert to fraction form
    215,931.58/321,681.23 = 206,216.21/x
  3. Step 3: Cross multiply
    215,931.58x = 321,681.23 × 206,216.21
  4. Step 4: Simplify right side
    215,931.58x = 66,335,884,078.74
  5. Step 5: Solve for x
    x = 66,335,884,078.74/215,931.58
  6. Step 6: Final answer
    x = 307,207.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.