Home / 1,440.69-2,161.58-618.81

Finding the Fourth Proportional to 1,440.69, 2,161.58 and 618.81

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Solution

The fourth proportional to 1,440.69, 2,161.58 and 618.81 is: 928.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.69 : 2,161.58 = 618.81 : x
  2. Step 2: Convert to fraction form
    1,440.69/2,161.58 = 618.81/x
  3. Step 3: Cross multiply
    1,440.69x = 2,161.58 × 618.81
  4. Step 4: Simplify right side
    1,440.69x = 1,337,604.23
  5. Step 5: Solve for x
    x = 1,337,604.23/1,440.69
  6. Step 6: Final answer
    x = 928.45

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1.5x scale

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.