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Finding the Fourth Proportional to 519,820.40, 779,989.80 and 295,353.20

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Solution

The fourth proportional to 519,820.40, 779,989.80 and 295,353.20 is: 443,177.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,820.40 : 779,989.80 = 295,353.20 : x
  2. Step 2: Convert to fraction form
    519,820.40/779,989.80 = 295,353.20/x
  3. Step 3: Cross multiply
    519,820.40x = 779,989.80 × 295,353.20
  4. Step 4: Simplify right side
    519,820.40x = 230,372,483,397.36
  5. Step 5: Solve for x
    x = 230,372,483,397.36/519,820.40
  6. Step 6: Final answer
    x = 443,177.07

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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.