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Finding the Fourth Proportional to 388,402.59, 535,924.04 and 218,600.67

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Solution

The fourth proportional to 388,402.59, 535,924.04 and 218,600.67 is: 301,628.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,402.59 : 535,924.04 = 218,600.67 : x
  2. Step 2: Convert to fraction form
    388,402.59/535,924.04 = 218,600.67/x
  3. Step 3: Cross multiply
    388,402.59x = 535,924.04 × 218,600.67
  4. Step 4: Simplify right side
    388,402.59x = 117,153,353,120.10
  5. Step 5: Solve for x
    x = 117,153,353,120.10/388,402.59
  6. Step 6: Final answer
    x = 301,628.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.