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Finding the Fourth Proportional to 3,280.18, 4,920.99 and 971.86

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Solution

The fourth proportional to 3,280.18, 4,920.99 and 971.86 is: 1,458.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.18 : 4,920.99 = 971.86 : x
  2. Step 2: Convert to fraction form
    3,280.18/4,920.99 = 971.86/x
  3. Step 3: Cross multiply
    3,280.18x = 4,920.99 × 971.86
  4. Step 4: Simplify right side
    3,280.18x = 4,782,513.34
  5. Step 5: Solve for x
    x = 4,782,513.34/3,280.18
  6. Step 6: Final answer
    x = 1,458.00

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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.