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Finding the Fourth Proportional to 665,254.05, 918,051.51 and 378,774.27

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Solution

The fourth proportional to 665,254.05, 918,051.51 and 378,774.27 is: 522,709.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,254.05 : 918,051.51 = 378,774.27 : x
  2. Step 2: Convert to fraction form
    665,254.05/918,051.51 = 378,774.27/x
  3. Step 3: Cross multiply
    665,254.05x = 918,051.51 × 378,774.27
  4. Step 4: Simplify right side
    665,254.05x = 347,734,290,522.65
  5. Step 5: Solve for x
    x = 347,734,290,522.65/665,254.05
  6. Step 6: Final answer
    x = 522,709.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.