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Finding the Fourth Proportional to 1,075.11, 1,612.59 and 416.85

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Solution

The fourth proportional to 1,075.11, 1,612.59 and 416.85 is: 625.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.11 : 1,612.59 = 416.85 : x
  2. Step 2: Convert to fraction form
    1,075.11/1,612.59 = 416.85/x
  3. Step 3: Cross multiply
    1,075.11x = 1,612.59 × 416.85
  4. Step 4: Simplify right side
    1,075.11x = 672,208.14
  5. Step 5: Solve for x
    x = 672,208.14/1,075.11
  6. Step 6: Final answer
    x = 625.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.