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Finding the Fourth Proportional to 918.73, 1,267.61 and 525.68

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Solution

The fourth proportional to 918.73, 1,267.61 and 525.68 is: 725.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.73 : 1,267.61 = 525.68 : x
  2. Step 2: Convert to fraction form
    918.73/1,267.61 = 525.68/x
  3. Step 3: Cross multiply
    918.73x = 1,267.61 × 525.68
  4. Step 4: Simplify right side
    918.73x = 666,357.22
  5. Step 5: Solve for x
    x = 666,357.22/918.73
  6. Step 6: Final answer
    x = 725.30

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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.