Home / 3,118.60-4,677.80-1,038.70

Finding the Fourth Proportional to 3,118.60, 4,677.80 and 1,038.70

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Solution

The fourth proportional to 3,118.60, 4,677.80 and 1,038.70 is: 1,558.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.60 : 4,677.80 = 1,038.70 : x
  2. Step 2: Convert to fraction form
    3,118.60/4,677.80 = 1,038.70/x
  3. Step 3: Cross multiply
    3,118.60x = 4,677.80 × 1,038.70
  4. Step 4: Simplify right side
    3,118.60x = 4,858,830.86
  5. Step 5: Solve for x
    x = 4,858,830.86/3,118.60
  6. Step 6: Final answer
    x = 1,558.02

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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.