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Finding the Fourth Proportional to 388,637.86, 536,306.08 and 216,546.93

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Solution

The fourth proportional to 388,637.86, 536,306.08 and 216,546.93 is: 298,826.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,637.86 : 536,306.08 = 216,546.93 : x
  2. Step 2: Convert to fraction form
    388,637.86/536,306.08 = 216,546.93/x
  3. Step 3: Cross multiply
    388,637.86x = 536,306.08 × 216,546.93
  4. Step 4: Simplify right side
    388,637.86x = 116,135,431,400.07
  5. Step 5: Solve for x
    x = 116,135,431,400.07/388,637.86
  6. Step 6: Final answer
    x = 298,826.86

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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.