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Finding the Fourth Proportional to 458,190.20, 687,458.10 and 221,742.20

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Solution

The fourth proportional to 458,190.20, 687,458.10 and 221,742.20 is: 332,696.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,190.20 : 687,458.10 = 221,742.20 : x
  2. Step 2: Convert to fraction form
    458,190.20/687,458.10 = 221,742.20/x
  3. Step 3: Cross multiply
    458,190.20x = 687,458.10 × 221,742.20
  4. Step 4: Simplify right side
    458,190.20x = 152,438,471,501.82
  5. Step 5: Solve for x
    x = 152,438,471,501.82/458,190.20
  6. Step 6: Final answer
    x = 332,696.93

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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.