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Finding the Fourth Proportional to 660,622.26, 911,643.22 and 388,707.77

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Solution

The fourth proportional to 660,622.26, 911,643.22 and 388,707.77 is: 536,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,622.26 : 911,643.22 = 388,707.77 : x
  2. Step 2: Convert to fraction form
    660,622.26/911,643.22 = 388,707.77/x
  3. Step 3: Cross multiply
    660,622.26x = 911,643.22 × 388,707.77
  4. Step 4: Simplify right side
    660,622.26x = 354,362,801,642.96
  5. Step 5: Solve for x
    x = 354,362,801,642.96/660,622.26
  6. Step 6: Final answer
    x = 536,407.60

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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.