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Finding the Fourth Proportional to 1,319.93, 1,979.94 and 589.51

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Solution

The fourth proportional to 1,319.93, 1,979.94 and 589.51 is: 884.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.93 : 1,979.94 = 589.51 : x
  2. Step 2: Convert to fraction form
    1,319.93/1,979.94 = 589.51/x
  3. Step 3: Cross multiply
    1,319.93x = 1,979.94 × 589.51
  4. Step 4: Simplify right side
    1,319.93x = 1,167,191.95
  5. Step 5: Solve for x
    x = 1,167,191.95/1,319.93
  6. Step 6: Final answer
    x = 884.29

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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.