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Finding the Fourth Proportional to 918.68, 1,267.68 and 504.68

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Solution

The fourth proportional to 918.68, 1,267.68 and 504.68 is: 696.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.68 : 1,267.68 = 504.68 : x
  2. Step 2: Convert to fraction form
    918.68/1,267.68 = 504.68/x
  3. Step 3: Cross multiply
    918.68x = 1,267.68 × 504.68
  4. Step 4: Simplify right side
    918.68x = 639,772.74
  5. Step 5: Solve for x
    x = 639,772.74/918.68
  6. Step 6: Final answer
    x = 696.40

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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.