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Finding the Fourth Proportional to 457,343.78, 631,134.36 and 256,139.78

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Solution

The fourth proportional to 457,343.78, 631,134.36 and 256,139.78 is: 353,472.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,343.78 : 631,134.36 = 256,139.78 : x
  2. Step 2: Convert to fraction form
    457,343.78/631,134.36 = 256,139.78/x
  3. Step 3: Cross multiply
    457,343.78x = 631,134.36 × 256,139.78
  4. Step 4: Simplify right side
    457,343.78x = 161,658,616,120.84
  5. Step 5: Solve for x
    x = 161,658,616,120.84/457,343.78
  6. Step 6: Final answer
    x = 353,472.86

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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.