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Finding the Fourth Proportional to 388,403.59, 535,925.41 and 218,601.67

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Solution

The fourth proportional to 388,403.59, 535,925.41 and 218,601.67 is: 301,630.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,403.59 : 535,925.41 = 218,601.67 : x
  2. Step 2: Convert to fraction form
    388,403.59/535,925.41 = 218,601.67/x
  3. Step 3: Cross multiply
    388,403.59x = 535,925.41 × 218,601.67
  4. Step 4: Simplify right side
    388,403.59x = 117,154,189,621.44
  5. Step 5: Solve for x
    x = 117,154,189,621.44/388,403.59
  6. Step 6: Final answer
    x = 301,630.04

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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.