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Finding the Fourth Proportional to 519,980.80, 779,971.20 and 348,738.70

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Solution

The fourth proportional to 519,980.80, 779,971.20 and 348,738.70 is: 523,108.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,980.80 : 779,971.20 = 348,738.70 : x
  2. Step 2: Convert to fraction form
    519,980.80/779,971.20 = 348,738.70/x
  3. Step 3: Cross multiply
    519,980.80x = 779,971.20 × 348,738.70
  4. Step 4: Simplify right side
    519,980.80x = 272,006,142,325.44
  5. Step 5: Solve for x
    x = 272,006,142,325.44/519,980.80
  6. Step 6: Final answer
    x = 523,108.05

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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.