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Finding the Fourth Proportional to 774.21, 1,068.39 and 424.88

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Solution

The fourth proportional to 774.21, 1,068.39 and 424.88 is: 586.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.21 : 1,068.39 = 424.88 : x
  2. Step 2: Convert to fraction form
    774.21/1,068.39 = 424.88/x
  3. Step 3: Cross multiply
    774.21x = 1,068.39 × 424.88
  4. Step 4: Simplify right side
    774.21x = 453,932.20
  5. Step 5: Solve for x
    x = 453,932.20/774.21
  6. Step 6: Final answer
    x = 586.32

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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.