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Finding the Fourth Proportional to 289,421.20, 433,210.20 and 206,477.20

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Solution

The fourth proportional to 289,421.20, 433,210.20 and 206,477.20 is: 309,058.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,421.20 : 433,210.20 = 206,477.20 : x
  2. Step 2: Convert to fraction form
    289,421.20/433,210.20 = 206,477.20/x
  3. Step 3: Cross multiply
    289,421.20x = 433,210.20 × 206,477.20
  4. Step 4: Simplify right side
    289,421.20x = 89,448,029,107.44
  5. Step 5: Solve for x
    x = 89,448,029,107.44/289,421.20
  6. Step 6: Final answer
    x = 309,058.32

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1.5x scale

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.