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Finding the Fourth Proportional to 779.17, 1,075.16 and 443.08

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Solution

The fourth proportional to 779.17, 1,075.16 and 443.08 is: 611.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.17 : 1,075.16 = 443.08 : x
  2. Step 2: Convert to fraction form
    779.17/1,075.16 = 443.08/x
  3. Step 3: Cross multiply
    779.17x = 1,075.16 × 443.08
  4. Step 4: Simplify right side
    779.17x = 476,374.30
  5. Step 5: Solve for x
    x = 476,374.30/779.17
  6. Step 6: Final answer
    x = 611.39

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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.