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Finding the Fourth Proportional to 751,138.72, 1,036,006 and 521,696.31

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Solution

The fourth proportional to 751,138.72, 1,036,006 and 521,696.31 is: 719,548.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    751,138.72 : 1,036,006 = 521,696.31 : x
  2. Step 2: Convert to fraction form
    751,138.72/1,036,006 = 521,696.31/x
  3. Step 3: Cross multiply
    751,138.72x = 1,036,006 × 521,696.31
  4. Step 4: Simplify right side
    751,138.72x = 540,480,507,337.86
  5. Step 5: Solve for x
    x = 540,480,507,337.86/751,138.72
  6. Step 6: Final answer
    x = 719,548.19

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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.