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Finding the Fourth Proportional to 639,116.86, 881,977.86 and 348,728.32

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Solution

The fourth proportional to 639,116.86, 881,977.86 and 348,728.32 is: 481,243.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,116.86 : 881,977.86 = 348,728.32 : x
  2. Step 2: Convert to fraction form
    639,116.86/881,977.86 = 348,728.32/x
  3. Step 3: Cross multiply
    639,116.86x = 881,977.86 × 348,728.32
  4. Step 4: Simplify right side
    639,116.86x = 307,570,657,395.00
  5. Step 5: Solve for x
    x = 307,570,657,395.00/639,116.86
  6. Step 6: Final answer
    x = 481,243.22

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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.