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Finding the Fourth Proportional to 383,428.80, 575,137.80 and 173,066.40

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Solution

The fourth proportional to 383,428.80, 575,137.80 and 173,066.40 is: 259,597.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,428.80 : 575,137.80 = 173,066.40 : x
  2. Step 2: Convert to fraction form
    383,428.80/575,137.80 = 173,066.40/x
  3. Step 3: Cross multiply
    383,428.80x = 575,137.80 × 173,066.40
  4. Step 4: Simplify right side
    383,428.80x = 99,537,028,549.92
  5. Step 5: Solve for x
    x = 99,537,028,549.92/383,428.80
  6. Step 6: Final answer
    x = 259,597.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.