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Finding the Fourth Proportional to 2,470.38, 3,705.46 and 621.40

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Solution

The fourth proportional to 2,470.38, 3,705.46 and 621.40 is: 932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,470.38 : 3,705.46 = 621.40 : x
  2. Step 2: Convert to fraction form
    2,470.38/3,705.46 = 621.40/x
  3. Step 3: Cross multiply
    2,470.38x = 3,705.46 × 621.40
  4. Step 4: Simplify right side
    2,470.38x = 2,302,572.84
  5. Step 5: Solve for x
    x = 2,302,572.84/2,470.38
  6. Step 6: Final answer
    x = 932.07

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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.