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Finding the Fourth Proportional to 6,445.80, 9,678.60 and 3,529.80

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Solution

The fourth proportional to 6,445.80, 9,678.60 and 3,529.80 is: 5,300.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,445.80 : 9,678.60 = 3,529.80 : x
  2. Step 2: Convert to fraction form
    6,445.80/9,678.60 = 3,529.80/x
  3. Step 3: Cross multiply
    6,445.80x = 9,678.60 × 3,529.80
  4. Step 4: Simplify right side
    6,445.80x = 34,163,522.28
  5. Step 5: Solve for x
    x = 34,163,522.28/6,445.80
  6. Step 6: Final answer
    x = 5,300.12

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1.5x scale

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.