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Finding the Fourth Proportional to 660,481.38, 911,743.32 and 445,912.08

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Solution

The fourth proportional to 660,481.38, 911,743.32 and 445,912.08 is: 615,547.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,481.38 : 911,743.32 = 445,912.08 : x
  2. Step 2: Convert to fraction form
    660,481.38/911,743.32 = 445,912.08/x
  3. Step 3: Cross multiply
    660,481.38x = 911,743.32 × 445,912.08
  4. Step 4: Simplify right side
    660,481.38x = 406,557,360,247.31
  5. Step 5: Solve for x
    x = 406,557,360,247.31/660,481.38
  6. Step 6: Final answer
    x = 615,547.04

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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.