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Finding the Fourth Proportional to 631,987.82, 872,146.28 and 345,507.92

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Solution

The fourth proportional to 631,987.82, 872,146.28 and 345,507.92 is: 476,802.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,987.82 : 872,146.28 = 345,507.92 : x
  2. Step 2: Convert to fraction form
    631,987.82/872,146.28 = 345,507.92/x
  3. Step 3: Cross multiply
    631,987.82x = 872,146.28 × 345,507.92
  4. Step 4: Simplify right side
    631,987.82x = 301,333,445,411.00
  5. Step 5: Solve for x
    x = 301,333,445,411.00/631,987.82
  6. Step 6: Final answer
    x = 476,802.62

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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.