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Finding the Fourth Proportional to 1,009.58, 1,393.09 and 589.86

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Solution

The fourth proportional to 1,009.58, 1,393.09 and 589.86 is: 813.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.58 : 1,393.09 = 589.86 : x
  2. Step 2: Convert to fraction form
    1,009.58/1,393.09 = 589.86/x
  3. Step 3: Cross multiply
    1,009.58x = 1,393.09 × 589.86
  4. Step 4: Simplify right side
    1,009.58x = 821,728.07
  5. Step 5: Solve for x
    x = 821,728.07/1,009.58
  6. Step 6: Final answer
    x = 813.93

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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.