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Finding the Fourth Proportional to 1,008.84, 1,392.08 and 589.28

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Solution

The fourth proportional to 1,008.84, 1,392.08 and 589.28 is: 813.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.84 : 1,392.08 = 589.28 : x
  2. Step 2: Convert to fraction form
    1,008.84/1,392.08 = 589.28/x
  3. Step 3: Cross multiply
    1,008.84x = 1,392.08 × 589.28
  4. Step 4: Simplify right side
    1,008.84x = 820,315.00
  5. Step 5: Solve for x
    x = 820,315.00/1,008.84
  6. Step 6: Final answer
    x = 813.13

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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.