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Finding the Fourth Proportional to 457,037.10, 630,053.91 and 320,648.49

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Solution

The fourth proportional to 457,037.10, 630,053.91 and 320,648.49 is: 442,033.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,037.10 : 630,053.91 = 320,648.49 : x
  2. Step 2: Convert to fraction form
    457,037.10/630,053.91 = 320,648.49/x
  3. Step 3: Cross multiply
    457,037.10x = 630,053.91 × 320,648.49
  4. Step 4: Simplify right side
    457,037.10x = 202,025,834,860.10
  5. Step 5: Solve for x
    x = 202,025,834,860.10/457,037.10
  6. Step 6: Final answer
    x = 442,033.78

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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.