Home / 1,145.86-1,719.04-415.36

Finding the Fourth Proportional to 1,145.86, 1,719.04 and 415.36

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Solution

The fourth proportional to 1,145.86, 1,719.04 and 415.36 is: 623.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.86 : 1,719.04 = 415.36 : x
  2. Step 2: Convert to fraction form
    1,145.86/1,719.04 = 415.36/x
  3. Step 3: Cross multiply
    1,145.86x = 1,719.04 × 415.36
  4. Step 4: Simplify right side
    1,145.86x = 714,020.45
  5. Step 5: Solve for x
    x = 714,020.45/1,145.86
  6. Step 6: Final answer
    x = 623.13

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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.