Home / 1,315,219.89-1,815,003.42-711,607.89

Finding the Fourth Proportional to 1,315,219.89, 1,815,003.42 and 711,607.89

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Solution

The fourth proportional to 1,315,219.89, 1,815,003.42 and 711,607.89 is: 982,018.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,219.89 : 1,815,003.42 = 711,607.89 : x
  2. Step 2: Convert to fraction form
    1,315,219.89/1,815,003.42 = 711,607.89/x
  3. Step 3: Cross multiply
    1,315,219.89x = 1,815,003.42 × 711,607.89
  4. Step 4: Simplify right side
    1,315,219.89x = 1,291,570,754,048.98
  5. Step 5: Solve for x
    x = 1,291,570,754,048.98/1,315,219.89
  6. Step 6: Final answer
    x = 982,018.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.