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Finding the Fourth Proportional to 288,605.70, 432,908.55 and 208,889.55

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Solution

The fourth proportional to 288,605.70, 432,908.55 and 208,889.55 is: 313,334.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,605.70 : 432,908.55 = 208,889.55 : x
  2. Step 2: Convert to fraction form
    288,605.70/432,908.55 = 208,889.55/x
  3. Step 3: Cross multiply
    288,605.70x = 432,908.55 × 208,889.55
  4. Step 4: Simplify right side
    288,605.70x = 90,430,072,200.65
  5. Step 5: Solve for x
    x = 90,430,072,200.65/288,605.70
  6. Step 6: Final answer
    x = 313,334.33

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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.