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Finding the Fourth Proportional to 289,377.80, 433,920.90 and 171,085.40

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Solution

The fourth proportional to 289,377.80, 433,920.90 and 171,085.40 is: 256,541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,377.80 : 433,920.90 = 171,085.40 : x
  2. Step 2: Convert to fraction form
    289,377.80/433,920.90 = 171,085.40/x
  3. Step 3: Cross multiply
    289,377.80x = 433,920.90 × 171,085.40
  4. Step 4: Simplify right side
    289,377.80x = 74,237,530,744.86
  5. Step 5: Solve for x
    x = 74,237,530,744.86/289,377.80
  6. Step 6: Final answer
    x = 256,541.90

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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.