Home / 1,318,941.70-1,978,412.55-780,064.90

Finding the Fourth Proportional to 1,318,941.70, 1,978,412.55 and 780,064.90

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Solution

The fourth proportional to 1,318,941.70, 1,978,412.55 and 780,064.90 is: 1,170,097.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,941.70 : 1,978,412.55 = 780,064.90 : x
  2. Step 2: Convert to fraction form
    1,318,941.70/1,978,412.55 = 780,064.90/x
  3. Step 3: Cross multiply
    1,318,941.70x = 1,978,412.55 × 780,064.90
  4. Step 4: Simplify right side
    1,318,941.70x = 1,543,290,187,974.50
  5. Step 5: Solve for x
    x = 1,543,290,187,974.50/1,318,941.70
  6. Step 6: Final answer
    x = 1,170,097.35

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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.