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Finding the Fourth Proportional to 1,317.84, 1,818.30 and 793.77

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Solution

The fourth proportional to 1,317.84, 1,818.30 and 793.77 is: 1,095.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.84 : 1,818.30 = 793.77 : x
  2. Step 2: Convert to fraction form
    1,317.84/1,818.30 = 793.77/x
  3. Step 3: Cross multiply
    1,317.84x = 1,818.30 × 793.77
  4. Step 4: Simplify right side
    1,317.84x = 1,443,311.99
  5. Step 5: Solve for x
    x = 1,443,311.99/1,317.84
  6. Step 6: Final answer
    x = 1,095.21

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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.