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Finding the Fourth Proportional to 338,570.49, 507,708.08 and 128,060.81

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Solution

The fourth proportional to 338,570.49, 507,708.08 and 128,060.81 is: 192,035.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,570.49 : 507,708.08 = 128,060.81 : x
  2. Step 2: Convert to fraction form
    338,570.49/507,708.08 = 128,060.81/x
  3. Step 3: Cross multiply
    338,570.49x = 507,708.08 × 128,060.81
  4. Step 4: Simplify right side
    338,570.49x = 65,017,507,968.34
  5. Step 5: Solve for x
    x = 65,017,507,968.34/338,570.49
  6. Step 6: Final answer
    x = 192,035.37

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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.