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Finding the Fourth Proportional to 303,775.40, 455,663.10 and 126,628.40

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Solution

The fourth proportional to 303,775.40, 455,663.10 and 126,628.40 is: 189,942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,775.40 : 455,663.10 = 126,628.40 : x
  2. Step 2: Convert to fraction form
    303,775.40/455,663.10 = 126,628.40/x
  3. Step 3: Cross multiply
    303,775.40x = 455,663.10 × 126,628.40
  4. Step 4: Simplify right side
    303,775.40x = 57,699,889,292.04
  5. Step 5: Solve for x
    x = 57,699,889,292.04/303,775.40
  6. Step 6: Final answer
    x = 189,942.60

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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.