Home / 3,929.83-5,420.76-2,603.05

Finding the Fourth Proportional to 3,929.83, 5,420.76 and 2,603.05

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Solution

The fourth proportional to 3,929.83, 5,420.76 and 2,603.05 is: 3,590.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.83 : 5,420.76 = 2,603.05 : x
  2. Step 2: Convert to fraction form
    3,929.83/5,420.76 = 2,603.05/x
  3. Step 3: Cross multiply
    3,929.83x = 5,420.76 × 2,603.05
  4. Step 4: Simplify right side
    3,929.83x = 14,110,509.32
  5. Step 5: Solve for x
    x = 14,110,509.32/3,929.83
  6. Step 6: Final answer
    x = 3,590.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.