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Finding the Fourth Proportional to 325,718.90, 487,608.47 and 291,507.38

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Solution

The fourth proportional to 325,718.90, 487,608.47 and 291,507.38 is: 436,393.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,718.90 : 487,608.47 = 291,507.38 : x
  2. Step 2: Convert to fraction form
    325,718.90/487,608.47 = 291,507.38/x
  3. Step 3: Cross multiply
    325,718.90x = 487,608.47 × 291,507.38
  4. Step 4: Simplify right side
    325,718.90x = 142,141,467,555.51
  5. Step 5: Solve for x
    x = 142,141,467,555.51/325,718.90
  6. Step 6: Final answer
    x = 436,393.06

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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.