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Finding the Fourth Proportional to 918.08, 1,377.28 and 340.96

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Solution

The fourth proportional to 918.08, 1,377.28 and 340.96 is: 511.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.08 : 1,377.28 = 340.96 : x
  2. Step 2: Convert to fraction form
    918.08/1,377.28 = 340.96/x
  3. Step 3: Cross multiply
    918.08x = 1,377.28 × 340.96
  4. Step 4: Simplify right side
    918.08x = 469,597.39
  5. Step 5: Solve for x
    x = 469,597.39/918.08
  6. Step 6: Final answer
    x = 511.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.