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Finding the Fourth Proportional to 457,341.78, 631,131.60 and 256,137.78

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Solution

The fourth proportional to 457,341.78, 631,131.60 and 256,137.78 is: 353,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,341.78 : 631,131.60 = 256,137.78 : x
  2. Step 2: Convert to fraction form
    457,341.78/631,131.60 = 256,137.78/x
  3. Step 3: Cross multiply
    457,341.78x = 631,131.60 × 256,137.78
  4. Step 4: Simplify right side
    457,341.78x = 161,656,646,911.85
  5. Step 5: Solve for x
    x = 161,656,646,911.85/457,341.78
  6. Step 6: Final answer
    x = 353,470.10

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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.