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Finding the Fourth Proportional to 666.83, 919.18 and 613.19

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Solution

The fourth proportional to 666.83, 919.18 and 613.19 is: 845.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.83 : 919.18 = 613.19 : x
  2. Step 2: Convert to fraction form
    666.83/919.18 = 613.19/x
  3. Step 3: Cross multiply
    666.83x = 919.18 × 613.19
  4. Step 4: Simplify right side
    666.83x = 563,631.98
  5. Step 5: Solve for x
    x = 563,631.98/666.83
  6. Step 6: Final answer
    x = 845.24

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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.