Home / 2,980.21-4,470.07-1,005.79

Finding the Fourth Proportional to 2,980.21, 4,470.07 and 1,005.79

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Solution

The fourth proportional to 2,980.21, 4,470.07 and 1,005.79 is: 1,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.21 : 4,470.07 = 1,005.79 : x
  2. Step 2: Convert to fraction form
    2,980.21/4,470.07 = 1,005.79/x
  3. Step 3: Cross multiply
    2,980.21x = 4,470.07 × 1,005.79
  4. Step 4: Simplify right side
    2,980.21x = 4,495,951.71
  5. Step 5: Solve for x
    x = 4,495,951.71/2,980.21
  6. Step 6: Final answer
    x = 1,508.60

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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.