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Finding the Fourth Proportional to 519,721.10, 779,609.60 and 164,762.80

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Solution

The fourth proportional to 519,721.10, 779,609.60 and 164,762.80 is: 247,153.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,721.10 : 779,609.60 = 164,762.80 : x
  2. Step 2: Convert to fraction form
    519,721.10/779,609.60 = 164,762.80/x
  3. Step 3: Cross multiply
    519,721.10x = 779,609.60 × 164,762.80
  4. Step 4: Simplify right side
    519,721.10x = 128,450,657,830.04
  5. Step 5: Solve for x
    x = 128,450,657,830.04/519,721.10
  6. Step 6: Final answer
    x = 247,153.05

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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.