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Finding the Fourth Proportional to 1,397,492.63, 1,928,608.25 and 785,837.94

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Solution

The fourth proportional to 1,397,492.63, 1,928,608.25 and 785,837.94 is: 1,084,494.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,492.63 : 1,928,608.25 = 785,837.94 : x
  2. Step 2: Convert to fraction form
    1,397,492.63/1,928,608.25 = 785,837.94/x
  3. Step 3: Cross multiply
    1,397,492.63x = 1,928,608.25 × 785,837.94
  4. Step 4: Simplify right side
    1,397,492.63x = 1,515,573,534,247.01
  5. Step 5: Solve for x
    x = 1,515,573,534,247.01/1,397,492.63
  6. Step 6: Final answer
    x = 1,084,494.83

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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.