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Finding the Fourth Proportional to 4,985.32, 7,478.04 and 2,135.42

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Solution

The fourth proportional to 4,985.32, 7,478.04 and 2,135.42 is: 3,203.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.32 : 7,478.04 = 2,135.42 : x
  2. Step 2: Convert to fraction form
    4,985.32/7,478.04 = 2,135.42/x
  3. Step 3: Cross multiply
    4,985.32x = 7,478.04 × 2,135.42
  4. Step 4: Simplify right side
    4,985.32x = 15,968,756.18
  5. Step 5: Solve for x
    x = 15,968,756.18/4,985.32
  6. Step 6: Final answer
    x = 3,203.16

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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.