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Finding the Fourth Proportional to 500,307.21, 690,419.12 and 270,858.62

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Solution

The fourth proportional to 500,307.21, 690,419.12 and 270,858.62 is: 373,782.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,307.21 : 690,419.12 = 270,858.62 : x
  2. Step 2: Convert to fraction form
    500,307.21/690,419.12 = 270,858.62/x
  3. Step 3: Cross multiply
    500,307.21x = 690,419.12 × 270,858.62
  4. Step 4: Simplify right side
    500,307.21x = 187,005,970,436.57
  5. Step 5: Solve for x
    x = 187,005,970,436.57/500,307.21
  6. Step 6: Final answer
    x = 373,782.28

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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.