Home / 4,285.20-6,428.70-1,323.40

Finding the Fourth Proportional to 4,285.20, 6,428.70 and 1,323.40

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Solution

The fourth proportional to 4,285.20, 6,428.70 and 1,323.40 is: 1,985.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,285.20 : 6,428.70 = 1,323.40 : x
  2. Step 2: Convert to fraction form
    4,285.20/6,428.70 = 1,323.40/x
  3. Step 3: Cross multiply
    4,285.20x = 6,428.70 × 1,323.40
  4. Step 4: Simplify right side
    4,285.20x = 8,507,741.58
  5. Step 5: Solve for x
    x = 8,507,741.58/4,285.20
  6. Step 6: Final answer
    x = 1,985.38

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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.