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Finding the Fourth Proportional to 774.48, 1,068.82 and 475.64

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Solution

The fourth proportional to 774.48, 1,068.82 and 475.64 is: 656.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.48 : 1,068.82 = 475.64 : x
  2. Step 2: Convert to fraction form
    774.48/1,068.82 = 475.64/x
  3. Step 3: Cross multiply
    774.48x = 1,068.82 × 475.64
  4. Step 4: Simplify right side
    774.48x = 508,373.54
  5. Step 5: Solve for x
    x = 508,373.54/774.48
  6. Step 6: Final answer
    x = 656.41

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1.5x scale

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.