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Finding the Fourth Proportional to 1,315,583.19, 1,815,504.78 and 711,971.19

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Solution

The fourth proportional to 1,315,583.19, 1,815,504.78 and 711,971.19 is: 982,520.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,583.19 : 1,815,504.78 = 711,971.19 : x
  2. Step 2: Convert to fraction form
    1,315,583.19/1,815,504.78 = 711,971.19/x
  3. Step 3: Cross multiply
    1,315,583.19x = 1,815,504.78 × 711,971.19
  4. Step 4: Simplify right side
    1,315,583.19x = 1,292,587,101,337.18
  5. Step 5: Solve for x
    x = 1,292,587,101,337.18/1,315,583.19
  6. Step 6: Final answer
    x = 982,520.23

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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.