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Finding the Fourth Proportional to 381,195.02, 571,646.61 and 128,407.58

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Solution

The fourth proportional to 381,195.02, 571,646.61 and 128,407.58 is: 192,562.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,195.02 : 571,646.61 = 128,407.58 : x
  2. Step 2: Convert to fraction form
    381,195.02/571,646.61 = 128,407.58/x
  3. Step 3: Cross multiply
    381,195.02x = 571,646.61 × 128,407.58
  4. Step 4: Simplify right side
    381,195.02x = 73,403,754,947.07
  5. Step 5: Solve for x
    x = 73,403,754,947.07/381,195.02
  6. Step 6: Final answer
    x = 192,562.21

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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.