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Finding the Fourth Proportional to 386,210.69, 532,992.65 and 216,455.75

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Solution

The fourth proportional to 386,210.69, 532,992.65 and 216,455.75 is: 298,721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,210.69 : 532,992.65 = 216,455.75 : x
  2. Step 2: Convert to fraction form
    386,210.69/532,992.65 = 216,455.75/x
  3. Step 3: Cross multiply
    386,210.69x = 532,992.65 × 216,455.75
  4. Step 4: Simplify right side
    386,210.69x = 115,369,323,800.24
  5. Step 5: Solve for x
    x = 115,369,323,800.24/386,210.69
  6. Step 6: Final answer
    x = 298,721.21

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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.