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Finding the Fourth Proportional to 774.15, 1,068.31 and 541.68

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Solution

The fourth proportional to 774.15, 1,068.31 and 541.68 is: 747.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.15 : 1,068.31 = 541.68 : x
  2. Step 2: Convert to fraction form
    774.15/1,068.31 = 541.68/x
  3. Step 3: Cross multiply
    774.15x = 1,068.31 × 541.68
  4. Step 4: Simplify right side
    774.15x = 578,678.83
  5. Step 5: Solve for x
    x = 578,678.83/774.15
  6. Step 6: Final answer
    x = 747.51

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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.