Home / 1,319,697.80-1,979,581.29-421,138.67

Finding the Fourth Proportional to 1,319,697.80, 1,979,581.29 and 421,138.67

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Solution

The fourth proportional to 1,319,697.80, 1,979,581.29 and 421,138.67 is: 631,719.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,697.80 : 1,979,581.29 = 421,138.67 : x
  2. Step 2: Convert to fraction form
    1,319,697.80/1,979,581.29 = 421,138.67/x
  3. Step 3: Cross multiply
    1,319,697.80x = 1,979,581.29 × 421,138.67
  4. Step 4: Simplify right side
    1,319,697.80x = 833,678,221,729.58
  5. Step 5: Solve for x
    x = 833,678,221,729.58/1,319,697.80
  6. Step 6: Final answer
    x = 631,719.04

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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.