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Finding the Fourth Proportional to 1,019,429.17, 1,404,739.33 and 788,584.64

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Solution

The fourth proportional to 1,019,429.17, 1,404,739.33 and 788,584.64 is: 1,086,643.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019,429.17 : 1,404,739.33 = 788,584.64 : x
  2. Step 2: Convert to fraction form
    1,019,429.17/1,404,739.33 = 788,584.64/x
  3. Step 3: Cross multiply
    1,019,429.17x = 1,404,739.33 × 788,584.64
  4. Step 4: Simplify right side
    1,019,429.17x = 1,107,755,849,846.73
  5. Step 5: Solve for x
    x = 1,107,755,849,846.73/1,019,429.17
  6. Step 6: Final answer
    x = 1,086,643.28

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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.