Home / 918,889.12-1,268,081.94-505,442.20

Finding the Fourth Proportional to 918,889.12, 1,268,081.94 and 505,442.20

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Solution

The fourth proportional to 918,889.12, 1,268,081.94 and 505,442.20 is: 697,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,889.12 : 1,268,081.94 = 505,442.20 : x
  2. Step 2: Convert to fraction form
    918,889.12/1,268,081.94 = 505,442.20/x
  3. Step 3: Cross multiply
    918,889.12x = 1,268,081.94 × 505,442.20
  4. Step 4: Simplify right side
    918,889.12x = 640,942,125,533.87
  5. Step 5: Solve for x
    x = 640,942,125,533.87/918,889.12
  6. Step 6: Final answer
    x = 697,518.46

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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.