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Finding the Fourth Proportional to 455,807.40, 683,711.10 and 219,611.40

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Solution

The fourth proportional to 455,807.40, 683,711.10 and 219,611.40 is: 329,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,807.40 : 683,711.10 = 219,611.40 : x
  2. Step 2: Convert to fraction form
    455,807.40/683,711.10 = 219,611.40/x
  3. Step 3: Cross multiply
    455,807.40x = 683,711.10 × 219,611.40
  4. Step 4: Simplify right side
    455,807.40x = 150,150,751,866.54
  5. Step 5: Solve for x
    x = 150,150,751,866.54/455,807.40
  6. Step 6: Final answer
    x = 329,417.10

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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.