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Finding the Fourth Proportional to 303,639.80, 455,459.70 and 298,974.20

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Solution

The fourth proportional to 303,639.80, 455,459.70 and 298,974.20 is: 448,461.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,639.80 : 455,459.70 = 298,974.20 : x
  2. Step 2: Convert to fraction form
    303,639.80/455,459.70 = 298,974.20/x
  3. Step 3: Cross multiply
    303,639.80x = 455,459.70 × 298,974.20
  4. Step 4: Simplify right side
    303,639.80x = 136,170,699,439.74
  5. Step 5: Solve for x
    x = 136,170,699,439.74/303,639.80
  6. Step 6: Final answer
    x = 448,461.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.