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Finding the Fourth Proportional to 485,989.79, 670,652.91 and 271,124.33

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Solution

The fourth proportional to 485,989.79, 670,652.91 and 271,124.33 is: 374,144.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,989.79 : 670,652.91 = 271,124.33 : x
  2. Step 2: Convert to fraction form
    485,989.79/670,652.91 = 271,124.33/x
  3. Step 3: Cross multiply
    485,989.79x = 670,652.91 × 271,124.33
  4. Step 4: Simplify right side
    485,989.79x = 181,830,317,533.04
  5. Step 5: Solve for x
    x = 181,830,317,533.04/485,989.79
  6. Step 6: Final answer
    x = 374,144.32

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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.