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Finding the Fourth Proportional to 388,757.54, 536,490.78 and 216,670.71

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Solution

The fourth proportional to 388,757.54, 536,490.78 and 216,670.71 is: 299,008.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,757.54 : 536,490.78 = 216,670.71 : x
  2. Step 2: Convert to fraction form
    388,757.54/536,490.78 = 216,670.71/x
  3. Step 3: Cross multiply
    388,757.54x = 536,490.78 × 216,670.71
  4. Step 4: Simplify right side
    388,757.54x = 116,241,839,410.38
  5. Step 5: Solve for x
    x = 116,241,839,410.38/388,757.54
  6. Step 6: Final answer
    x = 299,008.58

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1.5x scale

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.