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Finding the Fourth Proportional to 1,319,823.86, 1,821,356.93 and 716,211.86

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Solution

The fourth proportional to 1,319,823.86, 1,821,356.93 and 716,211.86 is: 988,372.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,823.86 : 1,821,356.93 = 716,211.86 : x
  2. Step 2: Convert to fraction form
    1,319,823.86/1,821,356.93 = 716,211.86/x
  3. Step 3: Cross multiply
    1,319,823.86x = 1,821,356.93 × 716,211.86
  4. Step 4: Simplify right side
    1,319,823.86x = 1,304,477,434,559.19
  5. Step 5: Solve for x
    x = 1,304,477,434,559.19/1,319,823.86
  6. Step 6: Final answer
    x = 988,372.37

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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.