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Finding the Fourth Proportional to 450,343.72, 621,446.34 and 249,139.72

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Solution

The fourth proportional to 450,343.72, 621,446.34 and 249,139.72 is: 343,797.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,343.72 : 621,446.34 = 249,139.72 : x
  2. Step 2: Convert to fraction form
    450,343.72/621,446.34 = 249,139.72/x
  3. Step 3: Cross multiply
    450,343.72x = 621,446.34 × 249,139.72
  4. Step 4: Simplify right side
    450,343.72x = 154,826,967,142.63
  5. Step 5: Solve for x
    x = 154,826,967,142.63/450,343.72
  6. Step 6: Final answer
    x = 343,797.33

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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.