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Finding the Fourth Proportional to 660,488.40, 911,753 and 445,919.08

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Solution

The fourth proportional to 660,488.40, 911,753 and 445,919.08 is: 615,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,488.40 : 911,753 = 445,919.08 : x
  2. Step 2: Convert to fraction form
    660,488.40/911,753 = 445,919.08/x
  3. Step 3: Cross multiply
    660,488.40x = 911,753 × 445,919.08
  4. Step 4: Simplify right side
    660,488.40x = 406,568,058,947.24
  5. Step 5: Solve for x
    x = 406,568,058,947.24/660,488.40
  6. Step 6: Final answer
    x = 615,556.70

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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.