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Finding the Fourth Proportional to 372,903.72, 558,921.60 and 213,091.65

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Solution

The fourth proportional to 372,903.72, 558,921.60 and 213,091.65 is: 319,389.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,903.72 : 558,921.60 = 213,091.65 : x
  2. Step 2: Convert to fraction form
    372,903.72/558,921.60 = 213,091.65/x
  3. Step 3: Cross multiply
    372,903.72x = 558,921.60 × 213,091.65
  4. Step 4: Simplify right side
    372,903.72x = 119,101,525,964.64
  5. Step 5: Solve for x
    x = 119,101,525,964.64/372,903.72
  6. Step 6: Final answer
    x = 319,389.48

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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.