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Finding the Fourth Proportional to 388,911.87, 536,679.14 and 219,156.93

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Solution

The fourth proportional to 388,911.87, 536,679.14 and 219,156.93 is: 302,425.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,911.87 : 536,679.14 = 219,156.93 : x
  2. Step 2: Convert to fraction form
    388,911.87/536,679.14 = 219,156.93/x
  3. Step 3: Cross multiply
    388,911.87x = 536,679.14 × 219,156.93
  4. Step 4: Simplify right side
    388,911.87x = 117,616,951,621.66
  5. Step 5: Solve for x
    x = 117,616,951,621.66/388,911.87
  6. Step 6: Final answer
    x = 302,425.72

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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.