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Finding the Fourth Proportional to 2,172.83, 3,259.08 and 612.77

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Solution

The fourth proportional to 2,172.83, 3,259.08 and 612.77 is: 919.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.83 : 3,259.08 = 612.77 : x
  2. Step 2: Convert to fraction form
    2,172.83/3,259.08 = 612.77/x
  3. Step 3: Cross multiply
    2,172.83x = 3,259.08 × 612.77
  4. Step 4: Simplify right side
    2,172.83x = 1,997,073.45
  5. Step 5: Solve for x
    x = 1,997,073.45/2,172.83
  6. Step 6: Final answer
    x = 919.11

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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.