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Finding the Fourth Proportional to 338,707.98, 507,900.69 and 128,211.66

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Solution

The fourth proportional to 338,707.98, 507,900.69 and 128,211.66 is: 192,256.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,707.98 : 507,900.69 = 128,211.66 : x
  2. Step 2: Convert to fraction form
    338,707.98/507,900.69 = 128,211.66/x
  3. Step 3: Cross multiply
    338,707.98x = 507,900.69 × 128,211.66
  4. Step 4: Simplify right side
    338,707.98x = 65,118,790,580.05
  5. Step 5: Solve for x
    x = 65,118,790,580.05/338,707.98
  6. Step 6: Final answer
    x = 192,256.44

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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.