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Finding the Fourth Proportional to 1,397,500.07, 1,928,618.51 and 785,845.40

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Solution

The fourth proportional to 1,397,500.07, 1,928,618.51 and 785,845.40 is: 1,084,505.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,500.07 : 1,928,618.51 = 785,845.40 : x
  2. Step 2: Convert to fraction form
    1,397,500.07/1,928,618.51 = 785,845.40/x
  3. Step 3: Cross multiply
    1,397,500.07x = 1,928,618.51 × 785,845.40
  4. Step 4: Simplify right side
    1,397,500.07x = 1,515,595,970,866.03
  5. Step 5: Solve for x
    x = 1,515,595,970,866.03/1,397,500.07
  6. Step 6: Final answer
    x = 1,084,505.12

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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.