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Finding the Fourth Proportional to 1,075.56, 1,613.40 and 306

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Solution

The fourth proportional to 1,075.56, 1,613.40 and 306 is: 459.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.56 : 1,613.40 = 306 : x
  2. Step 2: Convert to fraction form
    1,075.56/1,613.40 = 306/x
  3. Step 3: Cross multiply
    1,075.56x = 1,613.40 × 306
  4. Step 4: Simplify right side
    1,075.56x = 493,700.40
  5. Step 5: Solve for x
    x = 493,700.40/1,075.56
  6. Step 6: Final answer
    x = 459.02

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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.