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Finding the Fourth Proportional to 654,520.80, 981,781.20 and 455,455.20

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Solution

The fourth proportional to 654,520.80, 981,781.20 and 455,455.20 is: 683,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,520.80 : 981,781.20 = 455,455.20 : x
  2. Step 2: Convert to fraction form
    654,520.80/981,781.20 = 455,455.20/x
  3. Step 3: Cross multiply
    654,520.80x = 981,781.20 × 455,455.20
  4. Step 4: Simplify right side
    654,520.80x = 447,157,352,802.24
  5. Step 5: Solve for x
    x = 447,157,352,802.24/654,520.80
  6. Step 6: Final answer
    x = 683,182.80

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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.