Home / 289,392.85-434,089.45-120,821.28

Finding the Fourth Proportional to 289,392.85, 434,089.45 and 120,821.28

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Solution

The fourth proportional to 289,392.85, 434,089.45 and 120,821.28 is: 181,231.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,392.85 : 434,089.45 = 120,821.28 : x
  2. Step 2: Convert to fraction form
    289,392.85/434,089.45 = 120,821.28/x
  3. Step 3: Cross multiply
    289,392.85x = 434,089.45 × 120,821.28
  4. Step 4: Simplify right side
    289,392.85x = 52,447,242,983.50
  5. Step 5: Solve for x
    x = 52,447,242,983.50/289,392.85
  6. Step 6: Final answer
    x = 181,231.99

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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.