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Finding the Fourth Proportional to 660,078.56, 911,050.52 and 402,040.58

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Solution

The fourth proportional to 660,078.56, 911,050.52 and 402,040.58 is: 554,902.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,078.56 : 911,050.52 = 402,040.58 : x
  2. Step 2: Convert to fraction form
    660,078.56/911,050.52 = 402,040.58/x
  3. Step 3: Cross multiply
    660,078.56x = 911,050.52 × 402,040.58
  4. Step 4: Simplify right side
    660,078.56x = 366,279,275,919.95
  5. Step 5: Solve for x
    x = 366,279,275,919.95/660,078.56
  6. Step 6: Final answer
    x = 554,902.55

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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.