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Finding the Fourth Proportional to 500,661.64, 690,914.58 and 271,221.28

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Solution

The fourth proportional to 500,661.64, 690,914.58 and 271,221.28 is: 374,286.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,661.64 : 690,914.58 = 271,221.28 : x
  2. Step 2: Convert to fraction form
    500,661.64/690,914.58 = 271,221.28/x
  3. Step 3: Cross multiply
    500,661.64x = 690,914.58 × 271,221.28
  4. Step 4: Simplify right side
    500,661.64x = 187,390,736,758.26
  5. Step 5: Solve for x
    x = 187,390,736,758.26/500,661.64
  6. Step 6: Final answer
    x = 374,286.19

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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.