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Finding the Fourth Proportional to 289,022.40, 433,533.60 and 266,212.80

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Solution

The fourth proportional to 289,022.40, 433,533.60 and 266,212.80 is: 399,319.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,022.40 : 433,533.60 = 266,212.80 : x
  2. Step 2: Convert to fraction form
    289,022.40/433,533.60 = 266,212.80/x
  3. Step 3: Cross multiply
    289,022.40x = 433,533.60 × 266,212.80
  4. Step 4: Simplify right side
    289,022.40x = 115,412,193,550.08
  5. Step 5: Solve for x
    x = 115,412,193,550.08/289,022.40
  6. Step 6: Final answer
    x = 399,319.20

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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.