Home / 287,685.38-431,228.68-161,140.10

Finding the Fourth Proportional to 287,685.38, 431,228.68 and 161,140.10

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Solution

The fourth proportional to 287,685.38, 431,228.68 and 161,140.10 is: 241,542.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,685.38 : 431,228.68 = 161,140.10 : x
  2. Step 2: Convert to fraction form
    287,685.38/431,228.68 = 161,140.10/x
  3. Step 3: Cross multiply
    287,685.38x = 431,228.68 × 161,140.10
  4. Step 4: Simplify right side
    287,685.38x = 69,488,232,618.07
  5. Step 5: Solve for x
    x = 69,488,232,618.07/287,685.38
  6. Step 6: Final answer
    x = 241,542.45

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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.