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Finding the Fourth Proportional to 2,470.56, 3,705.84 and 990.46

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Solution

The fourth proportional to 2,470.56, 3,705.84 and 990.46 is: 1,485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,470.56 : 3,705.84 = 990.46 : x
  2. Step 2: Convert to fraction form
    2,470.56/3,705.84 = 990.46/x
  3. Step 3: Cross multiply
    2,470.56x = 3,705.84 × 990.46
  4. Step 4: Simplify right side
    2,470.56x = 3,670,477.02
  5. Step 5: Solve for x
    x = 3,670,477.02/2,470.56
  6. Step 6: Final answer
    x = 1,485.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.