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Finding the Fourth Proportional to 1,078,669.56, 1,488,648.02 and 619,944.18

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Solution

The fourth proportional to 1,078,669.56, 1,488,648.02 and 619,944.18 is: 855,571.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,669.56 : 1,488,648.02 = 619,944.18 : x
  2. Step 2: Convert to fraction form
    1,078,669.56/1,488,648.02 = 619,944.18/x
  3. Step 3: Cross multiply
    1,078,669.56x = 1,488,648.02 × 619,944.18
  4. Step 4: Simplify right side
    1,078,669.56x = 922,878,679,246.20
  5. Step 5: Solve for x
    x = 922,878,679,246.20/1,078,669.56
  6. Step 6: Final answer
    x = 855,571.27

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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.