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Finding the Fourth Proportional to 990,597.96, 1,367,064.38 and 555,019.09

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Solution

The fourth proportional to 990,597.96, 1,367,064.38 and 555,019.09 is: 765,948.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,597.96 : 1,367,064.38 = 555,019.09 : x
  2. Step 2: Convert to fraction form
    990,597.96/1,367,064.38 = 555,019.09/x
  3. Step 3: Cross multiply
    990,597.96x = 1,367,064.38 × 555,019.09
  4. Step 4: Simplify right side
    990,597.96x = 758,746,826,128.90
  5. Step 5: Solve for x
    x = 758,746,826,128.90/990,597.96
  6. Step 6: Final answer
    x = 765,948.30

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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.