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Finding the Fourth Proportional to 388,636.85, 536,304.70 and 216,545.93

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Solution

The fourth proportional to 388,636.85, 536,304.70 and 216,545.93 is: 298,825.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,636.85 : 536,304.70 = 216,545.93 : x
  2. Step 2: Convert to fraction form
    388,636.85/536,304.70 = 216,545.93/x
  3. Step 3: Cross multiply
    388,636.85x = 536,304.70 × 216,545.93
  4. Step 4: Simplify right side
    388,636.85x = 116,134,596,801.98
  5. Step 5: Solve for x
    x = 116,134,596,801.98/388,636.85
  6. Step 6: Final answer
    x = 298,825.49

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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.