Home / 687,074.40-1,030,128.71-302,640.84

Finding the Fourth Proportional to 687,074.40, 1,030,128.71 and 302,640.84

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Solution

The fourth proportional to 687,074.40, 1,030,128.71 and 302,640.84 is: 453,748.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,074.40 : 1,030,128.71 = 302,640.84 : x
  2. Step 2: Convert to fraction form
    687,074.40/1,030,128.71 = 302,640.84/x
  3. Step 3: Cross multiply
    687,074.40x = 1,030,128.71 × 302,640.84
  4. Step 4: Simplify right side
    687,074.40x = 311,759,016,589.31
  5. Step 5: Solve for x
    x = 311,759,016,589.31/687,074.40
  6. Step 6: Final answer
    x = 453,748.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.