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Finding the Fourth Proportional to 653,032.70, 978,236.85 and 440,456.30

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Solution

The fourth proportional to 653,032.70, 978,236.85 and 440,456.30 is: 659,799.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,032.70 : 978,236.85 = 440,456.30 : x
  2. Step 2: Convert to fraction form
    653,032.70/978,236.85 = 440,456.30/x
  3. Step 3: Cross multiply
    653,032.70x = 978,236.85 × 440,456.30
  4. Step 4: Simplify right side
    653,032.70x = 430,870,583,474.66
  5. Step 5: Solve for x
    x = 430,870,583,474.66/653,032.70
  6. Step 6: Final answer
    x = 659,799.40

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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.