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Finding the Fourth Proportional to 388,102.72, 535,579.68 and 218,337.92

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Solution

The fourth proportional to 388,102.72, 535,579.68 and 218,337.92 is: 301,305.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,102.72 : 535,579.68 = 218,337.92 : x
  2. Step 2: Convert to fraction form
    388,102.72/535,579.68 = 218,337.92/x
  3. Step 3: Cross multiply
    388,102.72x = 535,579.68 × 218,337.92
  4. Step 4: Simplify right side
    388,102.72x = 116,937,353,325.47
  5. Step 5: Solve for x
    x = 116,937,353,325.47/388,102.72
  6. Step 6: Final answer
    x = 301,305.16

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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.