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Finding the Fourth Proportional to 455,415.40, 683,123.10 and 266,458.60

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Solution

The fourth proportional to 455,415.40, 683,123.10 and 266,458.60 is: 399,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,415.40 : 683,123.10 = 266,458.60 : x
  2. Step 2: Convert to fraction form
    455,415.40/683,123.10 = 266,458.60/x
  3. Step 3: Cross multiply
    455,415.40x = 683,123.10 × 266,458.60
  4. Step 4: Simplify right side
    455,415.40x = 182,024,024,853.66
  5. Step 5: Solve for x
    x = 182,024,024,853.66/455,415.40
  6. Step 6: Final answer
    x = 399,687.90

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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.