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Finding the Fourth Proportional to 519,720.30, 729,008.10 and 519,720.30

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Solution

The fourth proportional to 519,720.30, 729,008.10 and 519,720.30 is: 729,008.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,720.30 : 729,008.10 = 519,720.30 : x
  2. Step 2: Convert to fraction form
    519,720.30/729,008.10 = 519,720.30/x
  3. Step 3: Cross multiply
    519,720.30x = 729,008.10 × 519,720.30
  4. Step 4: Simplify right side
    519,720.30x = 378,880,308,434.43
  5. Step 5: Solve for x
    x = 378,880,308,434.43/519,720.30
  6. Step 6: Final answer
    x = 729,008.10

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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.