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Finding the Fourth Proportional to 519,328.60, 728,109.80 and 519,328.60

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Solution

The fourth proportional to 519,328.60, 728,109.80 and 519,328.60 is: 728,109.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,328.60 : 728,109.80 = 519,328.60 : x
  2. Step 2: Convert to fraction form
    519,328.60/728,109.80 = 519,328.60/x
  3. Step 3: Cross multiply
    519,328.60x = 728,109.80 × 519,328.60
  4. Step 4: Simplify right side
    519,328.60x = 378,128,243,080.28
  5. Step 5: Solve for x
    x = 378,128,243,080.28/519,328.60
  6. Step 6: Final answer
    x = 728,109.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.