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Finding the Fourth Proportional to 325,328.42, 485,778.17 and 287,058.76

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Solution

The fourth proportional to 325,328.42, 485,778.17 and 287,058.76 is: 428,634.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,328.42 : 485,778.17 = 287,058.76 : x
  2. Step 2: Convert to fraction form
    325,328.42/485,778.17 = 287,058.76/x
  3. Step 3: Cross multiply
    325,328.42x = 485,778.17 × 287,058.76
  4. Step 4: Simplify right side
    325,328.42x = 139,446,878,618.47
  5. Step 5: Solve for x
    x = 139,446,878,618.47/325,328.42
  6. Step 6: Final answer
    x = 428,634.17

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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.