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Finding the Fourth Proportional to 858.56, 1,184.79 and 509.25

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Solution

The fourth proportional to 858.56, 1,184.79 and 509.25 is: 702.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.56 : 1,184.79 = 509.25 : x
  2. Step 2: Convert to fraction form
    858.56/1,184.79 = 509.25/x
  3. Step 3: Cross multiply
    858.56x = 1,184.79 × 509.25
  4. Step 4: Simplify right side
    858.56x = 603,354.31
  5. Step 5: Solve for x
    x = 603,354.31/858.56
  6. Step 6: Final answer
    x = 702.75

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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.