Home / 4,280.40-6,420.64-1,683.44

Finding the Fourth Proportional to 4,280.40, 6,420.64 and 1,683.44

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Solution

The fourth proportional to 4,280.40, 6,420.64 and 1,683.44 is: 2,525.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.40 : 6,420.64 = 1,683.44 : x
  2. Step 2: Convert to fraction form
    4,280.40/6,420.64 = 1,683.44/x
  3. Step 3: Cross multiply
    4,280.40x = 6,420.64 × 1,683.44
  4. Step 4: Simplify right side
    4,280.40x = 10,808,762.20
  5. Step 5: Solve for x
    x = 10,808,762.20/4,280.40
  6. Step 6: Final answer
    x = 2,525.18

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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.