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Finding the Fourth Proportional to 618,709.80, 928,064.70 and 303,781.80

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Solution

The fourth proportional to 618,709.80, 928,064.70 and 303,781.80 is: 455,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,709.80 : 928,064.70 = 303,781.80 : x
  2. Step 2: Convert to fraction form
    618,709.80/928,064.70 = 303,781.80/x
  3. Step 3: Cross multiply
    618,709.80x = 928,064.70 × 303,781.80
  4. Step 4: Simplify right side
    618,709.80x = 281,929,165,082.46
  5. Step 5: Solve for x
    x = 281,929,165,082.46/618,709.80
  6. Step 6: Final answer
    x = 455,672.70

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1.5x scale

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.