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Finding the Fourth Proportional to 866.16, 1,303.93 and 790.83

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Solution

The fourth proportional to 866.16, 1,303.93 and 790.83 is: 1,190.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.16 : 1,303.93 = 790.83 : x
  2. Step 2: Convert to fraction form
    866.16/1,303.93 = 790.83/x
  3. Step 3: Cross multiply
    866.16x = 1,303.93 × 790.83
  4. Step 4: Simplify right side
    866.16x = 1,031,186.96
  5. Step 5: Solve for x
    x = 1,031,186.96/866.16
  6. Step 6: Final answer
    x = 1,190.53

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.