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Finding the Fourth Proportional to 500,077.75, 690,111.60 and 285,228.69

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Solution

The fourth proportional to 500,077.75, 690,111.60 and 285,228.69 is: 393,618.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,077.75 : 690,111.60 = 285,228.69 : x
  2. Step 2: Convert to fraction form
    500,077.75/690,111.60 = 285,228.69/x
  3. Step 3: Cross multiply
    500,077.75x = 690,111.60 × 285,228.69
  4. Step 4: Simplify right side
    500,077.75x = 196,839,626,195.66
  5. Step 5: Solve for x
    x = 196,839,626,195.66/500,077.75
  6. Step 6: Final answer
    x = 393,618.04

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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.