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Finding the Fourth Proportional to 652,156.70, 978,235.05 and 439,580.30

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Solution

The fourth proportional to 652,156.70, 978,235.05 and 439,580.30 is: 659,370.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,156.70 : 978,235.05 = 439,580.30 : x
  2. Step 2: Convert to fraction form
    652,156.70/978,235.05 = 439,580.30/x
  3. Step 3: Cross multiply
    652,156.70x = 978,235.05 × 439,580.30
  4. Step 4: Simplify right side
    652,156.70x = 430,012,856,749.52
  5. Step 5: Solve for x
    x = 430,012,856,749.52/652,156.70
  6. Step 6: Final answer
    x = 659,370.45

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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.