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Finding the Fourth Proportional to 388,500.48, 582,854.40 and 139,207.68

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Solution

The fourth proportional to 388,500.48, 582,854.40 and 139,207.68 is: 208,848.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,500.48 : 582,854.40 = 139,207.68 : x
  2. Step 2: Convert to fraction form
    388,500.48/582,854.40 = 139,207.68/x
  3. Step 3: Cross multiply
    388,500.48x = 582,854.40 × 139,207.68
  4. Step 4: Simplify right side
    388,500.48x = 81,137,808,801.79
  5. Step 5: Solve for x
    x = 81,137,808,801.79/388,500.48
  6. Step 6: Final answer
    x = 208,848.67

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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.