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Finding the Fourth Proportional to 456,910.40, 630,447.04 and 287,046.40

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Solution

The fourth proportional to 456,910.40, 630,447.04 and 287,046.40 is: 396,067.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,910.40 : 630,447.04 = 287,046.40 : x
  2. Step 2: Convert to fraction form
    456,910.40/630,447.04 = 287,046.40/x
  3. Step 3: Cross multiply
    456,910.40x = 630,447.04 × 287,046.40
  4. Step 4: Simplify right side
    456,910.40x = 180,967,553,222.66
  5. Step 5: Solve for x
    x = 180,967,553,222.66/456,910.40
  6. Step 6: Final answer
    x = 396,067.92

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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.