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Finding the Fourth Proportional to 485,600.80, 670,116 and 281,638.84

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Solution

The fourth proportional to 485,600.80, 670,116 and 281,638.84 is: 388,654.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,600.80 : 670,116 = 281,638.84 : x
  2. Step 2: Convert to fraction form
    485,600.80/670,116 = 281,638.84/x
  3. Step 3: Cross multiply
    485,600.80x = 670,116 × 281,638.84
  4. Step 4: Simplify right side
    485,600.80x = 188,730,692,905.44
  5. Step 5: Solve for x
    x = 188,730,692,905.44/485,600.80
  6. Step 6: Final answer
    x = 388,654.00

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1.5x scale

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.