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Finding the Fourth Proportional to 309,489.84, 424,314.54 and 303,891.12

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Solution

The fourth proportional to 309,489.84, 424,314.54 and 303,891.12 is: 416,638.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,489.84 : 424,314.54 = 303,891.12 : x
  2. Step 2: Convert to fraction form
    309,489.84/424,314.54 = 303,891.12/x
  3. Step 3: Cross multiply
    309,489.84x = 424,314.54 × 303,891.12
  4. Step 4: Simplify right side
    309,489.84x = 128,945,420,792.89
  5. Step 5: Solve for x
    x = 128,945,420,792.89/309,489.84
  6. Step 6: Final answer
    x = 416,638.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.