Home / 1,388,705.40-2,082,631.64-489,936.96

Finding the Fourth Proportional to 1,388,705.40, 2,082,631.64 and 489,936.96

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Solution

The fourth proportional to 1,388,705.40, 2,082,631.64 and 489,936.96 is: 734,754.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,705.40 : 2,082,631.64 = 489,936.96 : x
  2. Step 2: Convert to fraction form
    1,388,705.40/2,082,631.64 = 489,936.96/x
  3. Step 3: Cross multiply
    1,388,705.40x = 2,082,631.64 × 489,936.96
  4. Step 4: Simplify right side
    1,388,705.40x = 1,020,358,214,501.41
  5. Step 5: Solve for x
    x = 1,020,358,214,501.41/1,388,705.40
  6. Step 6: Final answer
    x = 734,754.98

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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.