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Finding the Fourth Proportional to 1,397,486.02, 1,928,424.63 and 785,541.46

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Solution

The fourth proportional to 1,397,486.02, 1,928,424.63 and 785,541.46 is: 1,083,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,397,486.02 : 1,928,424.63 = 785,541.46 : x
  2. Step 2: Convert to fraction form
    1,397,486.02/1,928,424.63 = 785,541.46/x
  3. Step 3: Cross multiply
    1,397,486.02x = 1,928,424.63 × 785,541.46
  4. Step 4: Simplify right side
    1,397,486.02x = 1,514,857,499,350.16
  5. Step 5: Solve for x
    x = 1,514,857,499,350.16/1,397,486.02
  6. Step 6: Final answer
    x = 1,083,987.59

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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.