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Finding the Fourth Proportional to 929.96, 1,283.44 and 589.28

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Solution

The fourth proportional to 929.96, 1,283.44 and 589.28 is: 813.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.96 : 1,283.44 = 589.28 : x
  2. Step 2: Convert to fraction form
    929.96/1,283.44 = 589.28/x
  3. Step 3: Cross multiply
    929.96x = 1,283.44 × 589.28
  4. Step 4: Simplify right side
    929.96x = 756,305.52
  5. Step 5: Solve for x
    x = 756,305.52/929.96
  6. Step 6: Final answer
    x = 813.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.