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Finding the Fourth Proportional to 668.90, 923.06 and 370.17

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Solution

The fourth proportional to 668.90, 923.06 and 370.17 is: 510.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.90 : 923.06 = 370.17 : x
  2. Step 2: Convert to fraction form
    668.90/923.06 = 370.17/x
  3. Step 3: Cross multiply
    668.90x = 923.06 × 370.17
  4. Step 4: Simplify right side
    668.90x = 341,689.12
  5. Step 5: Solve for x
    x = 341,689.12/668.90
  6. Step 6: Final answer
    x = 510.82

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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.