Home / 4,280.16-6,420.85-1,358.72

Finding the Fourth Proportional to 4,280.16, 6,420.85 and 1,358.72

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Solution

The fourth proportional to 4,280.16, 6,420.85 and 1,358.72 is: 2,038.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.16 : 6,420.85 = 1,358.72 : x
  2. Step 2: Convert to fraction form
    4,280.16/6,420.85 = 1,358.72/x
  3. Step 3: Cross multiply
    4,280.16x = 6,420.85 × 1,358.72
  4. Step 4: Simplify right side
    4,280.16x = 8,724,137.31
  5. Step 5: Solve for x
    x = 8,724,137.31/4,280.16
  6. Step 6: Final answer
    x = 2,038.27

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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.