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Finding the Fourth Proportional to 665.50, 918.38 and 370.84

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Solution

The fourth proportional to 665.50, 918.38 and 370.84 is: 511.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.50 : 918.38 = 370.84 : x
  2. Step 2: Convert to fraction form
    665.50/918.38 = 370.84/x
  3. Step 3: Cross multiply
    665.50x = 918.38 × 370.84
  4. Step 4: Simplify right side
    665.50x = 340,572.04
  5. Step 5: Solve for x
    x = 340,572.04/665.50
  6. Step 6: Final answer
    x = 511.75

Related Problems

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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.