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Finding the Fourth Proportional to 388,455.76, 536,120.04 and 218,722.96

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Solution

The fourth proportional to 388,455.76, 536,120.04 and 218,722.96 is: 301,866.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,455.76 : 536,120.04 = 218,722.96 : x
  2. Step 2: Convert to fraction form
    388,455.76/536,120.04 = 218,722.96/x
  3. Step 3: Cross multiply
    388,455.76x = 536,120.04 × 218,722.96
  4. Step 4: Simplify right side
    388,455.76x = 117,261,762,064.12
  5. Step 5: Solve for x
    x = 117,261,762,064.12/388,455.76
  6. Step 6: Final answer
    x = 301,866.45

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1.5x scale

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.