Home / 660,741.75-911,746.26-388,749.83

Finding the Fourth Proportional to 660,741.75, 911,746.26 and 388,749.83

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Solution

The fourth proportional to 660,741.75, 911,746.26 and 388,749.83 is: 536,429.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,741.75 : 911,746.26 = 388,749.83 : x
  2. Step 2: Convert to fraction form
    660,741.75/911,746.26 = 388,749.83/x
  3. Step 3: Cross multiply
    660,741.75x = 911,746.26 × 388,749.83
  4. Step 4: Simplify right side
    660,741.75x = 354,441,199,019.41
  5. Step 5: Solve for x
    x = 354,441,199,019.41/660,741.75
  6. Step 6: Final answer
    x = 536,429.25

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1.5x scale

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.