Home / 1,415.99-2,121.16-1,106.40

Finding the Fourth Proportional to 1,415.99, 2,121.16 and 1,106.40

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Solution

The fourth proportional to 1,415.99, 2,121.16 and 1,106.40 is: 1,657.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.99 : 2,121.16 = 1,106.40 : x
  2. Step 2: Convert to fraction form
    1,415.99/2,121.16 = 1,106.40/x
  3. Step 3: Cross multiply
    1,415.99x = 2,121.16 × 1,106.40
  4. Step 4: Simplify right side
    1,415.99x = 2,346,851.42
  5. Step 5: Solve for x
    x = 2,346,851.42/1,415.99
  6. Step 6: Final answer
    x = 1,657.39

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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.