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Finding the Fourth Proportional to 342,521.21, 472,521.56 and 221,701.32

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Solution

The fourth proportional to 342,521.21, 472,521.56 and 221,701.32 is: 305,845.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,521.21 : 472,521.56 = 221,701.32 : x
  2. Step 2: Convert to fraction form
    342,521.21/472,521.56 = 221,701.32/x
  3. Step 3: Cross multiply
    342,521.21x = 472,521.56 × 221,701.32
  4. Step 4: Simplify right side
    342,521.21x = 104,758,652,471.95
  5. Step 5: Solve for x
    x = 104,758,652,471.95/342,521.21
  6. Step 6: Final answer
    x = 305,845.74

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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.