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Finding the Fourth Proportional to 3,281.58, 4,916.80 and 1,980.32

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Solution

The fourth proportional to 3,281.58, 4,916.80 and 1,980.32 is: 2,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,281.58 : 4,916.80 = 1,980.32 : x
  2. Step 2: Convert to fraction form
    3,281.58/4,916.80 = 1,980.32/x
  3. Step 3: Cross multiply
    3,281.58x = 4,916.80 × 1,980.32
  4. Step 4: Simplify right side
    3,281.58x = 9,736,802.89
  5. Step 5: Solve for x
    x = 9,736,802.89/3,281.58
  6. Step 6: Final answer
    x = 2,967.11

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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.