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Finding the Fourth Proportional to 342,915.83, 512,288.09 and 221,987.63

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Solution

The fourth proportional to 342,915.83, 512,288.09 and 221,987.63 is: 331,631.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,915.83 : 512,288.09 = 221,987.63 : x
  2. Step 2: Convert to fraction form
    342,915.83/512,288.09 = 221,987.63/x
  3. Step 3: Cross multiply
    342,915.83x = 512,288.09 × 221,987.63
  4. Step 4: Simplify right side
    342,915.83x = 113,721,617,866.39
  5. Step 5: Solve for x
    x = 113,721,617,866.39/342,915.83
  6. Step 6: Final answer
    x = 331,631.29

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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.