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Finding the Fourth Proportional to 926.77, 1,390.26 and 277.51

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Solution

The fourth proportional to 926.77, 1,390.26 and 277.51 is: 416.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.77 : 1,390.26 = 277.51 : x
  2. Step 2: Convert to fraction form
    926.77/1,390.26 = 277.51/x
  3. Step 3: Cross multiply
    926.77x = 1,390.26 × 277.51
  4. Step 4: Simplify right side
    926.77x = 385,811.05
  5. Step 5: Solve for x
    x = 385,811.05/926.77
  6. Step 6: Final answer
    x = 416.30

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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.