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Finding the Fourth Proportional to 342,405.72, 472,621.62 and 221,543.93

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Solution

The fourth proportional to 342,405.72, 472,621.62 and 221,543.93 is: 305,796.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,405.72 : 472,621.62 = 221,543.93 : x
  2. Step 2: Convert to fraction form
    342,405.72/472,621.62 = 221,543.93/x
  3. Step 3: Cross multiply
    342,405.72x = 472,621.62 × 221,543.93
  4. Step 4: Simplify right side
    342,405.72x = 104,706,448,734.66
  5. Step 5: Solve for x
    x = 104,706,448,734.66/342,405.72
  6. Step 6: Final answer
    x = 305,796.44

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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.