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Finding the Fourth Proportional to 455,576.40, 683,364.60 and 349,288.20

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Solution

The fourth proportional to 455,576.40, 683,364.60 and 349,288.20 is: 523,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,576.40 : 683,364.60 = 349,288.20 : x
  2. Step 2: Convert to fraction form
    455,576.40/683,364.60 = 349,288.20/x
  3. Step 3: Cross multiply
    455,576.40x = 683,364.60 × 349,288.20
  4. Step 4: Simplify right side
    455,576.40x = 238,691,191,077.72
  5. Step 5: Solve for x
    x = 238,691,191,077.72/455,576.40
  6. Step 6: Final answer
    x = 523,932.30

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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.