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Finding the Fourth Proportional to 307,722.40, 461,364.90 and 139,323.40

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Solution

The fourth proportional to 307,722.40, 461,364.90 and 139,323.40 is: 208,886.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,722.40 : 461,364.90 = 139,323.40 : x
  2. Step 2: Convert to fraction form
    307,722.40/461,364.90 = 139,323.40/x
  3. Step 3: Cross multiply
    307,722.40x = 461,364.90 × 139,323.40
  4. Step 4: Simplify right side
    307,722.40x = 64,278,926,508.66
  5. Step 5: Solve for x
    x = 64,278,926,508.66/307,722.40
  6. Step 6: Final answer
    x = 208,886.08

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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.