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Finding the Fourth Proportional to 1,326,879, 1,990,320.57 and 403,643.01

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Solution

The fourth proportional to 1,326,879, 1,990,320.57 and 403,643.01 is: 605,465.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,879 : 1,990,320.57 = 403,643.01 : x
  2. Step 2: Convert to fraction form
    1,326,879/1,990,320.57 = 403,643.01/x
  3. Step 3: Cross multiply
    1,326,879x = 1,990,320.57 × 403,643.01
  4. Step 4: Simplify right side
    1,326,879x = 803,378,985,739.72
  5. Step 5: Solve for x
    x = 803,378,985,739.72/1,326,879
  6. Step 6: Final answer
    x = 605,465.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.