Home / 645,784.10-968,760.79-213,357.90

Finding the Fourth Proportional to 645,784.10, 968,760.79 and 213,357.90

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Solution

The fourth proportional to 645,784.10, 968,760.79 and 213,357.90 is: 320,064.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,784.10 : 968,760.79 = 213,357.90 : x
  2. Step 2: Convert to fraction form
    645,784.10/968,760.79 = 213,357.90/x
  3. Step 3: Cross multiply
    645,784.10x = 968,760.79 × 213,357.90
  4. Step 4: Simplify right side
    645,784.10x = 206,692,767,756.74
  5. Step 5: Solve for x
    x = 206,692,767,756.74/645,784.10
  6. Step 6: Final answer
    x = 320,064.81

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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.