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Finding the Fourth Proportional to 660,496.60, 911,701.74 and 388,550.44

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Solution

The fourth proportional to 660,496.60, 911,701.74 and 388,550.44 is: 536,326.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,496.60 : 911,701.74 = 388,550.44 : x
  2. Step 2: Convert to fraction form
    660,496.60/911,701.74 = 388,550.44/x
  3. Step 3: Cross multiply
    660,496.60x = 911,701.74 × 388,550.44
  4. Step 4: Simplify right side
    660,496.60x = 354,242,112,225.77
  5. Step 5: Solve for x
    x = 354,242,112,225.77/660,496.60
  6. Step 6: Final answer
    x = 536,326.93

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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.