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Finding the Fourth Proportional to 644,156.80, 966,235.20 and 607,415.20

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Solution

The fourth proportional to 644,156.80, 966,235.20 and 607,415.20 is: 911,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,156.80 : 966,235.20 = 607,415.20 : x
  2. Step 2: Convert to fraction form
    644,156.80/966,235.20 = 607,415.20/x
  3. Step 3: Cross multiply
    644,156.80x = 966,235.20 × 607,415.20
  4. Step 4: Simplify right side
    644,156.80x = 586,905,947,255.04
  5. Step 5: Solve for x
    x = 586,905,947,255.04/644,156.80
  6. Step 6: Final answer
    x = 911,122.80

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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.