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Finding the Fourth Proportional to 784.95, 1,077.45 and 694.46

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Solution

The fourth proportional to 784.95, 1,077.45 and 694.46 is: 953.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.95 : 1,077.45 = 694.46 : x
  2. Step 2: Convert to fraction form
    784.95/1,077.45 = 694.46/x
  3. Step 3: Cross multiply
    784.95x = 1,077.45 × 694.46
  4. Step 4: Simplify right side
    784.95x = 748,240.54
  5. Step 5: Solve for x
    x = 748,240.54/784.95
  6. Step 6: Final answer
    x = 953.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.