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Finding the Fourth Proportional to 379,751.80, 569,129.40 and 279,442.30

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Solution

The fourth proportional to 379,751.80, 569,129.40 and 279,442.30 is: 418,796.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,751.80 : 569,129.40 = 279,442.30 : x
  2. Step 2: Convert to fraction form
    379,751.80/569,129.40 = 279,442.30/x
  3. Step 3: Cross multiply
    379,751.80x = 569,129.40 × 279,442.30
  4. Step 4: Simplify right side
    379,751.80x = 159,038,828,533.62
  5. Step 5: Solve for x
    x = 159,038,828,533.62/379,751.80
  6. Step 6: Final answer
    x = 418,796.77

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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.