Home / 905,285.30-1,249,273.62-491,811.38

Finding the Fourth Proportional to 905,285.30, 1,249,273.62 and 491,811.38

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Solution

The fourth proportional to 905,285.30, 1,249,273.62 and 491,811.38 is: 678,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,285.30 : 1,249,273.62 = 491,811.38 : x
  2. Step 2: Convert to fraction form
    905,285.30/1,249,273.62 = 491,811.38/x
  3. Step 3: Cross multiply
    905,285.30x = 1,249,273.62 × 491,811.38
  4. Step 4: Simplify right side
    905,285.30x = 614,406,983,049.80
  5. Step 5: Solve for x
    x = 614,406,983,049.80/905,285.30
  6. Step 6: Final answer
    x = 678,688.79

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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.