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Finding the Fourth Proportional to 929.06, 1,281.75 and 667.34

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Solution

The fourth proportional to 929.06, 1,281.75 and 667.34 is: 920.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.06 : 1,281.75 = 667.34 : x
  2. Step 2: Convert to fraction form
    929.06/1,281.75 = 667.34/x
  3. Step 3: Cross multiply
    929.06x = 1,281.75 × 667.34
  4. Step 4: Simplify right side
    929.06x = 855,363.05
  5. Step 5: Solve for x
    x = 855,363.05/929.06
  6. Step 6: Final answer
    x = 920.68

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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.