Home / 1,379.20-2,065.68-1,070.08

Finding the Fourth Proportional to 1,379.20, 2,065.68 and 1,070.08

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Solution

The fourth proportional to 1,379.20, 2,065.68 and 1,070.08 is: 1,602.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.20 : 2,065.68 = 1,070.08 : x
  2. Step 2: Convert to fraction form
    1,379.20/2,065.68 = 1,070.08/x
  3. Step 3: Cross multiply
    1,379.20x = 2,065.68 × 1,070.08
  4. Step 4: Simplify right side
    1,379.20x = 2,210,442.85
  5. Step 5: Solve for x
    x = 2,210,442.85/1,379.20
  6. Step 6: Final answer
    x = 1,602.70

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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.