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Finding the Fourth Proportional to 388,137.42, 535,629.51 and 216,051.65

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Solution

The fourth proportional to 388,137.42, 535,629.51 and 216,051.65 is: 298,151.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,137.42 : 535,629.51 = 216,051.65 : x
  2. Step 2: Convert to fraction form
    388,137.42/535,629.51 = 216,051.65/x
  3. Step 3: Cross multiply
    388,137.42x = 535,629.51 × 216,051.65
  4. Step 4: Simplify right side
    388,137.42x = 115,723,636,746.04
  5. Step 5: Solve for x
    x = 115,723,636,746.04/388,137.42
  6. Step 6: Final answer
    x = 298,151.20

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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.