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Finding the Fourth Proportional to 654,505.80, 981,758.70 and 455,440.20

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Solution

The fourth proportional to 654,505.80, 981,758.70 and 455,440.20 is: 683,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,505.80 : 981,758.70 = 455,440.20 : x
  2. Step 2: Convert to fraction form
    654,505.80/981,758.70 = 455,440.20/x
  3. Step 3: Cross multiply
    654,505.80x = 981,758.70 × 455,440.20
  4. Step 4: Simplify right side
    654,505.80x = 447,132,378,679.74
  5. Step 5: Solve for x
    x = 447,132,378,679.74/654,505.80
  6. Step 6: Final answer
    x = 683,160.30

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Double scale
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Similar ratio
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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.