Home / 911,907.28-1,257,779.38-640,035.84

Finding the Fourth Proportional to 911,907.28, 1,257,779.38 and 640,035.84

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Solution

The fourth proportional to 911,907.28, 1,257,779.38 and 640,035.84 is: 882,791.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,907.28 : 1,257,779.38 = 640,035.84 : x
  2. Step 2: Convert to fraction form
    911,907.28/1,257,779.38 = 640,035.84/x
  3. Step 3: Cross multiply
    911,907.28x = 1,257,779.38 × 640,035.84
  4. Step 4: Simplify right side
    911,907.28x = 805,023,881,268.67
  5. Step 5: Solve for x
    x = 805,023,881,268.67/911,907.28
  6. Step 6: Final answer
    x = 882,791.38

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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.