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Finding the Fourth Proportional to 1,319.96, 1,978.73 and 589.14

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Solution

The fourth proportional to 1,319.96, 1,978.73 and 589.14 is: 883.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.96 : 1,978.73 = 589.14 : x
  2. Step 2: Convert to fraction form
    1,319.96/1,978.73 = 589.14/x
  3. Step 3: Cross multiply
    1,319.96x = 1,978.73 × 589.14
  4. Step 4: Simplify right side
    1,319.96x = 1,165,748.26
  5. Step 5: Solve for x
    x = 1,165,748.26/1,319.96
  6. Step 6: Final answer
    x = 883.17

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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.