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Finding the Fourth Proportional to 388,722.26, 536,445.59 and 216,657.92

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Solution

The fourth proportional to 388,722.26, 536,445.59 and 216,657.92 is: 298,992.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,722.26 : 536,445.59 = 216,657.92 : x
  2. Step 2: Convert to fraction form
    388,722.26/536,445.59 = 216,657.92/x
  3. Step 3: Cross multiply
    388,722.26x = 536,445.59 × 216,657.92
  4. Step 4: Simplify right side
    388,722.26x = 116,225,181,957.06
  5. Step 5: Solve for x
    x = 116,225,181,957.06/388,722.26
  6. Step 6: Final answer
    x = 298,992.87

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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.