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Finding the Fourth Proportional to 282,990.08, 390,519.80 and 155,662.96

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Solution

The fourth proportional to 282,990.08, 390,519.80 and 155,662.96 is: 214,811.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,990.08 : 390,519.80 = 155,662.96 : x
  2. Step 2: Convert to fraction form
    282,990.08/390,519.80 = 155,662.96/x
  3. Step 3: Cross multiply
    282,990.08x = 390,519.80 × 155,662.96
  4. Step 4: Simplify right side
    282,990.08x = 60,789,468,006.61
  5. Step 5: Solve for x
    x = 60,789,468,006.61/282,990.08
  6. Step 6: Final answer
    x = 214,811.30

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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.