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Finding the Fourth Proportional to 388,017.84, 535,453.65 and 215,933.06

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Solution

The fourth proportional to 388,017.84, 535,453.65 and 215,933.06 is: 297,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,017.84 : 535,453.65 = 215,933.06 : x
  2. Step 2: Convert to fraction form
    388,017.84/535,453.65 = 215,933.06/x
  3. Step 3: Cross multiply
    388,017.84x = 535,453.65 × 215,933.06
  4. Step 4: Simplify right side
    388,017.84x = 115,622,146,471.30
  5. Step 5: Solve for x
    x = 115,622,146,471.30/388,017.84
  6. Step 6: Final answer
    x = 297,981.52

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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.