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Finding the Fourth Proportional to 1,383.65, 2,075.53 and 459.29

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Solution

The fourth proportional to 1,383.65, 2,075.53 and 459.29 is: 688.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.65 : 2,075.53 = 459.29 : x
  2. Step 2: Convert to fraction form
    1,383.65/2,075.53 = 459.29/x
  3. Step 3: Cross multiply
    1,383.65x = 2,075.53 × 459.29
  4. Step 4: Simplify right side
    1,383.65x = 953,277.08
  5. Step 5: Solve for x
    x = 953,277.08/1,383.65
  6. Step 6: Final answer
    x = 688.96

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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.