Home / 397,921.45-549,113.70-216,628.78

Finding the Fourth Proportional to 397,921.45, 549,113.70 and 216,628.78

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Solution

The fourth proportional to 397,921.45, 549,113.70 and 216,628.78 is: 298,937.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,921.45 : 549,113.70 = 216,628.78 : x
  2. Step 2: Convert to fraction form
    397,921.45/549,113.70 = 216,628.78/x
  3. Step 3: Cross multiply
    397,921.45x = 549,113.70 × 216,628.78
  4. Step 4: Simplify right side
    397,921.45x = 118,953,830,912.29
  5. Step 5: Solve for x
    x = 118,953,830,912.29/397,921.45
  6. Step 6: Final answer
    x = 298,937.97

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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.