Home / 500,535.45-690,185.43-318,959.78

Finding the Fourth Proportional to 500,535.45, 690,185.43 and 318,959.78

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Solution

The fourth proportional to 500,535.45, 690,185.43 and 318,959.78 is: 439,811.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,535.45 : 690,185.43 = 318,959.78 : x
  2. Step 2: Convert to fraction form
    500,535.45/690,185.43 = 318,959.78/x
  3. Step 3: Cross multiply
    500,535.45x = 690,185.43 × 318,959.78
  4. Step 4: Simplify right side
    500,535.45x = 220,141,389,461.08
  5. Step 5: Solve for x
    x = 220,141,389,461.08/500,535.45
  6. Step 6: Final answer
    x = 439,811.78

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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.