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Finding the Fourth Proportional to 342,916.83, 512,289.58 and 221,988.63

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Solution

The fourth proportional to 342,916.83, 512,289.58 and 221,988.63 is: 331,632.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,916.83 : 512,289.58 = 221,988.63 : x
  2. Step 2: Convert to fraction form
    342,916.83/512,289.58 = 221,988.63/x
  3. Step 3: Cross multiply
    342,916.83x = 512,289.58 × 221,988.63
  4. Step 4: Simplify right side
    342,916.83x = 113,722,462,027.48
  5. Step 5: Solve for x
    x = 113,722,462,027.48/342,916.83
  6. Step 6: Final answer
    x = 331,632.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.