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Finding the Fourth Proportional to 312,658.20, 431,455.86 and 183,579.48

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Solution

The fourth proportional to 312,658.20, 431,455.86 and 183,579.48 is: 253,332.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,658.20 : 431,455.86 = 183,579.48 : x
  2. Step 2: Convert to fraction form
    312,658.20/431,455.86 = 183,579.48/x
  3. Step 3: Cross multiply
    312,658.20x = 431,455.86 × 183,579.48
  4. Step 4: Simplify right side
    312,658.20x = 79,206,442,421.75
  5. Step 5: Solve for x
    x = 79,206,442,421.75/312,658.20
  6. Step 6: Final answer
    x = 253,332.37

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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.