Home / 3,280.40-4,917.36-1,547

Finding the Fourth Proportional to 3,280.40, 4,917.36 and 1,547

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Solution

The fourth proportional to 3,280.40, 4,917.36 and 1,547 is: 2,318.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.40 : 4,917.36 = 1,547 : x
  2. Step 2: Convert to fraction form
    3,280.40/4,917.36 = 1,547/x
  3. Step 3: Cross multiply
    3,280.40x = 4,917.36 × 1,547
  4. Step 4: Simplify right side
    3,280.40x = 7,607,155.92
  5. Step 5: Solve for x
    x = 7,607,155.92/3,280.40
  6. Step 6: Final answer
    x = 2,318.97

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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.