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Finding the Fourth Proportional to 774.48, 1,068.81 and 442.93

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Solution

The fourth proportional to 774.48, 1,068.81 and 442.93 is: 611.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.48 : 1,068.81 = 442.93 : x
  2. Step 2: Convert to fraction form
    774.48/1,068.81 = 442.93/x
  3. Step 3: Cross multiply
    774.48x = 1,068.81 × 442.93
  4. Step 4: Simplify right side
    774.48x = 473,408.01
  5. Step 5: Solve for x
    x = 473,408.01/774.48
  6. Step 6: Final answer
    x = 611.26

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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.