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Finding the Fourth Proportional to 289,450.51, 399,636.64 and 180,720.39

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Solution

The fourth proportional to 289,450.51, 399,636.64 and 180,720.39 is: 249,515.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,450.51 : 399,636.64 = 180,720.39 : x
  2. Step 2: Convert to fraction form
    289,450.51/399,636.64 = 180,720.39/x
  3. Step 3: Cross multiply
    289,450.51x = 399,636.64 × 180,720.39
  4. Step 4: Simplify right side
    289,450.51x = 72,222,489,023.10
  5. Step 5: Solve for x
    x = 72,222,489,023.10/289,450.51
  6. Step 6: Final answer
    x = 249,515.84

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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.