Home / 2,784.20-4,176.02-836.40

Finding the Fourth Proportional to 2,784.20, 4,176.02 and 836.40

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Solution

The fourth proportional to 2,784.20, 4,176.02 and 836.40 is: 1,254.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,784.20 : 4,176.02 = 836.40 : x
  2. Step 2: Convert to fraction form
    2,784.20/4,176.02 = 836.40/x
  3. Step 3: Cross multiply
    2,784.20x = 4,176.02 × 836.40
  4. Step 4: Simplify right side
    2,784.20x = 3,492,823.13
  5. Step 5: Solve for x
    x = 3,492,823.13/2,784.20
  6. Step 6: Final answer
    x = 1,254.52

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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.