Home / 1,440.07-2,160.11-790.45

Finding the Fourth Proportional to 1,440.07, 2,160.11 and 790.45

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Solution

The fourth proportional to 1,440.07, 2,160.11 and 790.45 is: 1,185.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.07 : 2,160.11 = 790.45 : x
  2. Step 2: Convert to fraction form
    1,440.07/2,160.11 = 790.45/x
  3. Step 3: Cross multiply
    1,440.07x = 2,160.11 × 790.45
  4. Step 4: Simplify right side
    1,440.07x = 1,707,444.20
  5. Step 5: Solve for x
    x = 1,707,444.20/1,440.07
  6. Step 6: Final answer
    x = 1,185.67

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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.