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Finding the Fourth Proportional to 779.05, 1,075.05 and 517.54

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Solution

The fourth proportional to 779.05, 1,075.05 and 517.54 is: 714.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.05 : 1,075.05 = 517.54 : x
  2. Step 2: Convert to fraction form
    779.05/1,075.05 = 517.54/x
  3. Step 3: Cross multiply
    779.05x = 1,075.05 × 517.54
  4. Step 4: Simplify right side
    779.05x = 556,381.38
  5. Step 5: Solve for x
    x = 556,381.38/779.05
  6. Step 6: Final answer
    x = 714.18

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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.