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Finding the Fourth Proportional to 774.64, 1,068.98 and 443.02

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Solution

The fourth proportional to 774.64, 1,068.98 and 443.02 is: 611.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.64 : 1,068.98 = 443.02 : x
  2. Step 2: Convert to fraction form
    774.64/1,068.98 = 443.02/x
  3. Step 3: Cross multiply
    774.64x = 1,068.98 × 443.02
  4. Step 4: Simplify right side
    774.64x = 473,579.52
  5. Step 5: Solve for x
    x = 473,579.52/774.64
  6. Step 6: Final answer
    x = 611.35

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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.