Home / 4,280.45-6,420.67-2,871.65

Finding the Fourth Proportional to 4,280.45, 6,420.67 and 2,871.65

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Solution

The fourth proportional to 4,280.45, 6,420.67 and 2,871.65 is: 4,307.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.45 : 6,420.67 = 2,871.65 : x
  2. Step 2: Convert to fraction form
    4,280.45/6,420.67 = 2,871.65/x
  3. Step 3: Cross multiply
    4,280.45x = 6,420.67 × 2,871.65
  4. Step 4: Simplify right side
    4,280.45x = 18,437,925.88
  5. Step 5: Solve for x
    x = 18,437,925.88/4,280.45
  6. Step 6: Final answer
    x = 4,307.48

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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.