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Finding the Fourth Proportional to 946.78, 1,418.91 and 535.75

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Solution

The fourth proportional to 946.78, 1,418.91 and 535.75 is: 802.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.78 : 1,418.91 = 535.75 : x
  2. Step 2: Convert to fraction form
    946.78/1,418.91 = 535.75/x
  3. Step 3: Cross multiply
    946.78x = 1,418.91 × 535.75
  4. Step 4: Simplify right side
    946.78x = 760,181.03
  5. Step 5: Solve for x
    x = 760,181.03/946.78
  6. Step 6: Final answer
    x = 802.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.