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Finding the Fourth Proportional to 652,295.70, 978,443.55 and 439,719.30

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Solution

The fourth proportional to 652,295.70, 978,443.55 and 439,719.30 is: 659,578.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,295.70 : 978,443.55 = 439,719.30 : x
  2. Step 2: Convert to fraction form
    652,295.70/978,443.55 = 439,719.30/x
  3. Step 3: Cross multiply
    652,295.70x = 978,443.55 × 439,719.30
  4. Step 4: Simplify right side
    652,295.70x = 430,240,512,895.52
  5. Step 5: Solve for x
    x = 430,240,512,895.52/652,295.70
  6. Step 6: Final answer
    x = 659,578.95

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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.