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Finding the Fourth Proportional to 478,391.40, 717,569.16 and 118,563.44

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Solution

The fourth proportional to 478,391.40, 717,569.16 and 118,563.44 is: 177,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,391.40 : 717,569.16 = 118,563.44 : x
  2. Step 2: Convert to fraction form
    478,391.40/717,569.16 = 118,563.44/x
  3. Step 3: Cross multiply
    478,391.40x = 717,569.16 × 118,563.44
  4. Step 4: Simplify right side
    478,391.40x = 85,077,466,705.94
  5. Step 5: Solve for x
    x = 85,077,466,705.94/478,391.40
  6. Step 6: Final answer
    x = 177,840.71

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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.