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Finding the Fourth Proportional to 442,991.12, 612,127.41 and 315,445.28

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Solution

The fourth proportional to 442,991.12, 612,127.41 and 315,445.28 is: 435,883.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,991.12 : 612,127.41 = 315,445.28 : x
  2. Step 2: Convert to fraction form
    442,991.12/612,127.41 = 315,445.28/x
  3. Step 3: Cross multiply
    442,991.12x = 612,127.41 × 315,445.28
  4. Step 4: Simplify right side
    442,991.12x = 193,092,702,243.13
  5. Step 5: Solve for x
    x = 193,092,702,243.13/442,991.12
  6. Step 6: Final answer
    x = 435,883.91

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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.