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Finding the Fourth Proportional to 919.02, 1,267.42 and 722.19

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Solution

The fourth proportional to 919.02, 1,267.42 and 722.19 is: 995.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.02 : 1,267.42 = 722.19 : x
  2. Step 2: Convert to fraction form
    919.02/1,267.42 = 722.19/x
  3. Step 3: Cross multiply
    919.02x = 1,267.42 × 722.19
  4. Step 4: Simplify right side
    919.02x = 915,320.82
  5. Step 5: Solve for x
    x = 915,320.82/919.02
  6. Step 6: Final answer
    x = 995.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.