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Finding the Fourth Proportional to 1,393,302.76, 1,923,166.52 and 909,940.96

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Solution

The fourth proportional to 1,393,302.76, 1,923,166.52 and 909,940.96 is: 1,255,985.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,302.76 : 1,923,166.52 = 909,940.96 : x
  2. Step 2: Convert to fraction form
    1,393,302.76/1,923,166.52 = 909,940.96/x
  3. Step 3: Cross multiply
    1,393,302.76x = 1,923,166.52 × 909,940.96
  4. Step 4: Simplify right side
    1,393,302.76x = 1,749,967,989,448.66
  5. Step 5: Solve for x
    x = 1,749,967,989,448.66/1,393,302.76
  6. Step 6: Final answer
    x = 1,255,985.45

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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.