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Finding the Fourth Proportional to 774.62, 1,068.89 and 443.01

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Solution

The fourth proportional to 774.62, 1,068.89 and 443.01 is: 611.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.62 : 1,068.89 = 443.01 : x
  2. Step 2: Convert to fraction form
    774.62/1,068.89 = 443.01/x
  3. Step 3: Cross multiply
    774.62x = 1,068.89 × 443.01
  4. Step 4: Simplify right side
    774.62x = 473,526.74
  5. Step 5: Solve for x
    x = 473,526.74/774.62
  6. Step 6: Final answer
    x = 611.31

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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.