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Finding the Fourth Proportional to 325,364.95, 485,832.57 and 287,095.28

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Solution

The fourth proportional to 325,364.95, 485,832.57 and 287,095.28 is: 428,688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,364.95 : 485,832.57 = 287,095.28 : x
  2. Step 2: Convert to fraction form
    325,364.95/485,832.57 = 287,095.28/x
  3. Step 3: Cross multiply
    325,364.95x = 485,832.57 × 287,095.28
  4. Step 4: Simplify right side
    325,364.95x = 139,480,237,717.27
  5. Step 5: Solve for x
    x = 139,480,237,717.27/325,364.95
  6. Step 6: Final answer
    x = 428,688.58

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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.