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Finding the Fourth Proportional to 339,041.80, 508,727.88 and 139,422.16

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Solution

The fourth proportional to 339,041.80, 508,727.88 and 139,422.16 is: 209,201.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,041.80 : 508,727.88 = 139,422.16 : x
  2. Step 2: Convert to fraction form
    339,041.80/508,727.88 = 139,422.16/x
  3. Step 3: Cross multiply
    339,041.80x = 508,727.88 × 139,422.16
  4. Step 4: Simplify right side
    339,041.80x = 70,927,939,881.82
  5. Step 5: Solve for x
    x = 70,927,939,881.82/339,041.80
  6. Step 6: Final answer
    x = 209,201.17

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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.