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Finding the Fourth Proportional to 1,315,583.75, 1,815,505.56 and 711,971.75

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Solution

The fourth proportional to 1,315,583.75, 1,815,505.56 and 711,971.75 is: 982,521.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,583.75 : 1,815,505.56 = 711,971.75 : x
  2. Step 2: Convert to fraction form
    1,315,583.75/1,815,505.56 = 711,971.75/x
  3. Step 3: Cross multiply
    1,315,583.75x = 1,815,505.56 × 711,971.75
  4. Step 4: Simplify right side
    1,315,583.75x = 1,292,588,675,226.69
  5. Step 5: Solve for x
    x = 1,292,588,675,226.69/1,315,583.75
  6. Step 6: Final answer
    x = 982,521.01

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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.