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Finding the Fourth Proportional to 342,328.72, 472,254.45 and 221,508.98

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Solution

The fourth proportional to 342,328.72, 472,254.45 and 221,508.98 is: 305,579.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,328.72 : 472,254.45 = 221,508.98 : x
  2. Step 2: Convert to fraction form
    342,328.72/472,254.45 = 221,508.98/x
  3. Step 3: Cross multiply
    342,328.72x = 472,254.45 × 221,508.98
  4. Step 4: Simplify right side
    342,328.72x = 104,608,601,519.96
  5. Step 5: Solve for x
    x = 104,608,601,519.96/342,328.72
  6. Step 6: Final answer
    x = 305,579.39

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1.5x scale

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.