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Finding the Fourth Proportional to 355,591, 490,296.30 and 287,397.10

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Solution

The fourth proportional to 355,591, 490,296.30 and 287,397.10 is: 396,269.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,591 : 490,296.30 = 287,397.10 : x
  2. Step 2: Convert to fraction form
    355,591/490,296.30 = 287,397.10/x
  3. Step 3: Cross multiply
    355,591x = 490,296.30 × 287,397.10
  4. Step 4: Simplify right side
    355,591x = 140,909,734,760.73
  5. Step 5: Solve for x
    x = 140,909,734,760.73/355,591
  6. Step 6: Final answer
    x = 396,269.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.