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Finding the Fourth Proportional to 398,780.68, 550,006.22 and 255,554.08

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Solution

The fourth proportional to 398,780.68, 550,006.22 and 255,554.08 is: 352,465.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,780.68 : 550,006.22 = 255,554.08 : x
  2. Step 2: Convert to fraction form
    398,780.68/550,006.22 = 255,554.08/x
  3. Step 3: Cross multiply
    398,780.68x = 550,006.22 × 255,554.08
  4. Step 4: Simplify right side
    398,780.68x = 140,556,333,546.38
  5. Step 5: Solve for x
    x = 140,556,333,546.38/398,780.68
  6. Step 6: Final answer
    x = 352,465.25

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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.