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Finding the Fourth Proportional to 388,502.48, 582,857.40 and 139,209.68

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Solution

The fourth proportional to 388,502.48, 582,857.40 and 139,209.68 is: 208,851.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,502.48 : 582,857.40 = 139,209.68 : x
  2. Step 2: Convert to fraction form
    388,502.48/582,857.40 = 139,209.68/x
  3. Step 3: Cross multiply
    388,502.48x = 582,857.40 × 139,209.68
  4. Step 4: Simplify right side
    388,502.48x = 81,139,392,139.63
  5. Step 5: Solve for x
    x = 81,139,392,139.63/388,502.48
  6. Step 6: Final answer
    x = 208,851.67

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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.