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Finding the Fourth Proportional to 388,799.05, 536,545.31 and 216,728.16

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Solution

The fourth proportional to 388,799.05, 536,545.31 and 216,728.16 is: 299,086.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,799.05 : 536,545.31 = 216,728.16 : x
  2. Step 2: Convert to fraction form
    388,799.05/536,545.31 = 216,728.16/x
  3. Step 3: Cross multiply
    388,799.05x = 536,545.31 × 216,728.16
  4. Step 4: Simplify right side
    388,799.05x = 116,284,477,792.93
  5. Step 5: Solve for x
    x = 116,284,477,792.93/388,799.05
  6. Step 6: Final answer
    x = 299,086.32

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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.