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Finding the Fourth Proportional to 455,531.70, 683,297.55 and 431,037.30

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Solution

The fourth proportional to 455,531.70, 683,297.55 and 431,037.30 is: 646,555.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,531.70 : 683,297.55 = 431,037.30 : x
  2. Step 2: Convert to fraction form
    455,531.70/683,297.55 = 431,037.30/x
  3. Step 3: Cross multiply
    455,531.70x = 683,297.55 × 431,037.30
  4. Step 4: Simplify right side
    455,531.70x = 294,526,731,048.62
  5. Step 5: Solve for x
    x = 294,526,731,048.62/455,531.70
  6. Step 6: Final answer
    x = 646,555.95

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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.