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Finding the Fourth Proportional to 918.76, 1,267.94 and 608.04

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Solution

The fourth proportional to 918.76, 1,267.94 and 608.04 is: 839.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.76 : 1,267.94 = 608.04 : x
  2. Step 2: Convert to fraction form
    918.76/1,267.94 = 608.04/x
  3. Step 3: Cross multiply
    918.76x = 1,267.94 × 608.04
  4. Step 4: Simplify right side
    918.76x = 770,958.24
  5. Step 5: Solve for x
    x = 770,958.24/918.76
  6. Step 6: Final answer
    x = 839.13

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Double scale
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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.