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Finding the Fourth Proportional to 325,330.42, 485,781.16 and 287,060.76

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Solution

The fourth proportional to 325,330.42, 485,781.16 and 287,060.76 is: 428,637.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,330.42 : 485,781.16 = 287,060.76 : x
  2. Step 2: Convert to fraction form
    325,330.42/485,781.16 = 287,060.76/x
  3. Step 3: Cross multiply
    325,330.42x = 485,781.16 × 287,060.76
  4. Step 4: Simplify right side
    325,330.42x = 139,448,708,983.28
  5. Step 5: Solve for x
    x = 139,448,708,983.28/325,330.42
  6. Step 6: Final answer
    x = 428,637.17

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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.