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Finding the Fourth Proportional to 388,136.66, 535,628.48 and 216,050.89

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Solution

The fourth proportional to 388,136.66, 535,628.48 and 216,050.89 is: 298,150.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,136.66 : 535,628.48 = 216,050.89 : x
  2. Step 2: Convert to fraction form
    388,136.66/535,628.48 = 216,050.89/x
  3. Step 3: Cross multiply
    388,136.66x = 535,628.48 × 216,050.89
  4. Step 4: Simplify right side
    388,136.66x = 115,723,007,394.02
  5. Step 5: Solve for x
    x = 115,723,007,394.02/388,136.66
  6. Step 6: Final answer
    x = 298,150.16

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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.