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Finding the Fourth Proportional to 846.95, 1,276.77 and 790.50

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Solution

The fourth proportional to 846.95, 1,276.77 and 790.50 is: 1,191.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.95 : 1,276.77 = 790.50 : x
  2. Step 2: Convert to fraction form
    846.95/1,276.77 = 790.50/x
  3. Step 3: Cross multiply
    846.95x = 1,276.77 × 790.50
  4. Step 4: Simplify right side
    846.95x = 1,009,282.52
  5. Step 5: Solve for x
    x = 1,009,282.52/846.95
  6. Step 6: Final answer
    x = 1,191.67

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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.