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Finding the Fourth Proportional to 331,655.90, 457,686.64 and 188,423.80

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Solution

The fourth proportional to 331,655.90, 457,686.64 and 188,423.80 is: 260,025.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,655.90 : 457,686.64 = 188,423.80 : x
  2. Step 2: Convert to fraction form
    331,655.90/457,686.64 = 188,423.80/x
  3. Step 3: Cross multiply
    331,655.90x = 457,686.64 × 188,423.80
  4. Step 4: Simplify right side
    331,655.90x = 86,239,055,918.03
  5. Step 5: Solve for x
    x = 86,239,055,918.03/331,655.90
  6. Step 6: Final answer
    x = 260,025.70

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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.