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Finding the Fourth Proportional to 784.01, 1,168.08 and 776.32

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Solution

The fourth proportional to 784.01, 1,168.08 and 776.32 is: 1,156.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.01 : 1,168.08 = 776.32 : x
  2. Step 2: Convert to fraction form
    784.01/1,168.08 = 776.32/x
  3. Step 3: Cross multiply
    784.01x = 1,168.08 × 776.32
  4. Step 4: Simplify right side
    784.01x = 906,800.95
  5. Step 5: Solve for x
    x = 906,800.95/784.01
  6. Step 6: Final answer
    x = 1,156.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.