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Finding the Fourth Proportional to 500,067.28, 690,075.60 and 285,276.88

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Solution

The fourth proportional to 500,067.28, 690,075.60 and 285,276.88 is: 393,672.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,067.28 : 690,075.60 = 285,276.88 : x
  2. Step 2: Convert to fraction form
    500,067.28/690,075.60 = 285,276.88/x
  3. Step 3: Cross multiply
    500,067.28x = 690,075.60 × 285,276.88
  4. Step 4: Simplify right side
    500,067.28x = 196,862,614,132.13
  5. Step 5: Solve for x
    x = 196,862,614,132.13/500,067.28
  6. Step 6: Final answer
    x = 393,672.26

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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.