Home / 1,320,488.92-1,979,989.75-421,719.40

Finding the Fourth Proportional to 1,320,488.92, 1,979,989.75 and 421,719.40

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Solution

The fourth proportional to 1,320,488.92, 1,979,989.75 and 421,719.40 is: 632,341.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,488.92 : 1,979,989.75 = 421,719.40 : x
  2. Step 2: Convert to fraction form
    1,320,488.92/1,979,989.75 = 421,719.40/x
  3. Step 3: Cross multiply
    1,320,488.92x = 1,979,989.75 × 421,719.40
  4. Step 4: Simplify right side
    1,320,488.92x = 835,000,089,376.15
  5. Step 5: Solve for x
    x = 835,000,089,376.15/1,320,488.92
  6. Step 6: Final answer
    x = 632,341.61

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.