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Finding the Fourth Proportional to 768,278.94, 1,059,782.58 and 445,947.54

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Solution

The fourth proportional to 768,278.94, 1,059,782.58 and 445,947.54 is: 615,150.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,278.94 : 1,059,782.58 = 445,947.54 : x
  2. Step 2: Convert to fraction form
    768,278.94/1,059,782.58 = 445,947.54/x
  3. Step 3: Cross multiply
    768,278.94x = 1,059,782.58 × 445,947.54
  4. Step 4: Simplify right side
    768,278.94x = 472,607,434,485.85
  5. Step 5: Solve for x
    x = 472,607,434,485.85/768,278.94
  6. Step 6: Final answer
    x = 615,150.84

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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.