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Finding the Fourth Proportional to 617,678.53, 852,275.19 and 388,102.83

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Solution

The fourth proportional to 617,678.53, 852,275.19 and 388,102.83 is: 535,505.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,678.53 : 852,275.19 = 388,102.83 : x
  2. Step 2: Convert to fraction form
    617,678.53/852,275.19 = 388,102.83/x
  3. Step 3: Cross multiply
    617,678.53x = 852,275.19 × 388,102.83
  4. Step 4: Simplify right side
    617,678.53x = 330,770,413,177.79
  5. Step 5: Solve for x
    x = 330,770,413,177.79/617,678.53
  6. Step 6: Final answer
    x = 535,505.76

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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.