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Finding the Fourth Proportional to 652,392.10, 978,588.15 and 439,815.70

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Solution

The fourth proportional to 652,392.10, 978,588.15 and 439,815.70 is: 659,723.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,392.10 : 978,588.15 = 439,815.70 : x
  2. Step 2: Convert to fraction form
    652,392.10/978,588.15 = 439,815.70/x
  3. Step 3: Cross multiply
    652,392.10x = 978,588.15 × 439,815.70
  4. Step 4: Simplify right side
    652,392.10x = 430,398,432,203.96
  5. Step 5: Solve for x
    x = 430,398,432,203.96/652,392.10
  6. Step 6: Final answer
    x = 659,723.55

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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.