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Finding the Fourth Proportional to 858.32, 1,184.28 and 579.07

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Solution

The fourth proportional to 858.32, 1,184.28 and 579.07 is: 798.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.32 : 1,184.28 = 579.07 : x
  2. Step 2: Convert to fraction form
    858.32/1,184.28 = 579.07/x
  3. Step 3: Cross multiply
    858.32x = 1,184.28 × 579.07
  4. Step 4: Simplify right side
    858.32x = 685,775.89
  5. Step 5: Solve for x
    x = 685,775.89/858.32
  6. Step 6: Final answer
    x = 798.98

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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.