Home / 818,556.12-1,129,641.48-455,979.88

Finding the Fourth Proportional to 818,556.12, 1,129,641.48 and 455,979.88

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Solution

The fourth proportional to 818,556.12, 1,129,641.48 and 455,979.88 is: 629,271.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,556.12 : 1,129,641.48 = 455,979.88 : x
  2. Step 2: Convert to fraction form
    818,556.12/1,129,641.48 = 455,979.88/x
  3. Step 3: Cross multiply
    818,556.12x = 1,129,641.48 × 455,979.88
  4. Step 4: Simplify right side
    818,556.12x = 515,093,781,389.42
  5. Step 5: Solve for x
    x = 515,093,781,389.42/818,556.12
  6. Step 6: Final answer
    x = 629,271.19

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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.