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Finding the Fourth Proportional to 6,420.40, 9,630.16 and 1,803.40

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Solution

The fourth proportional to 6,420.40, 9,630.16 and 1,803.40 is: 2,704.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.40 : 9,630.16 = 1,803.40 : x
  2. Step 2: Convert to fraction form
    6,420.40/9,630.16 = 1,803.40/x
  3. Step 3: Cross multiply
    6,420.40x = 9,630.16 × 1,803.40
  4. Step 4: Simplify right side
    6,420.40x = 17,367,030.54
  5. Step 5: Solve for x
    x = 17,367,030.54/6,420.40
  6. Step 6: Final answer
    x = 2,704.98

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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.