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Finding the Fourth Proportional to 917.77, 1,376.72 and 268.52

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Solution

The fourth proportional to 917.77, 1,376.72 and 268.52 is: 402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.77 : 1,376.72 = 268.52 : x
  2. Step 2: Convert to fraction form
    917.77/1,376.72 = 268.52/x
  3. Step 3: Cross multiply
    917.77x = 1,376.72 × 268.52
  4. Step 4: Simplify right side
    917.77x = 369,675.51
  5. Step 5: Solve for x
    x = 369,675.51/917.77
  6. Step 6: Final answer
    x = 402.80

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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.