Home / 4,280.64-6,421.60-1,972.80

Finding the Fourth Proportional to 4,280.64, 6,421.60 and 1,972.80

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Solution

The fourth proportional to 4,280.64, 6,421.60 and 1,972.80 is: 2,959.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.64 : 6,421.60 = 1,972.80 : x
  2. Step 2: Convert to fraction form
    4,280.64/6,421.60 = 1,972.80/x
  3. Step 3: Cross multiply
    4,280.64x = 6,421.60 × 1,972.80
  4. Step 4: Simplify right side
    4,280.64x = 12,668,532.48
  5. Step 5: Solve for x
    x = 12,668,532.48/4,280.64
  6. Step 6: Final answer
    x = 2,959.49

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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.