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Finding the Fourth Proportional to 450,282.78, 621,391.50 and 249,078.78

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Solution

The fourth proportional to 450,282.78, 621,391.50 and 249,078.78 is: 343,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,282.78 : 621,391.50 = 249,078.78 : x
  2. Step 2: Convert to fraction form
    450,282.78/621,391.50 = 249,078.78/x
  3. Step 3: Cross multiply
    450,282.78x = 621,391.50 × 249,078.78
  4. Step 4: Simplify right side
    450,282.78x = 154,775,436,722.37
  5. Step 5: Solve for x
    x = 154,775,436,722.37/450,282.78
  6. Step 6: Final answer
    x = 343,729.42

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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.