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Finding the Fourth Proportional to 678,374.84, 936,231.54 and 388,013.06

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Solution

The fourth proportional to 678,374.84, 936,231.54 and 388,013.06 is: 535,500.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,374.84 : 936,231.54 = 388,013.06 : x
  2. Step 2: Convert to fraction form
    678,374.84/936,231.54 = 388,013.06/x
  3. Step 3: Cross multiply
    678,374.84x = 936,231.54 × 388,013.06
  4. Step 4: Simplify right side
    678,374.84x = 363,270,064,703.91
  5. Step 5: Solve for x
    x = 363,270,064,703.91/678,374.84
  6. Step 6: Final answer
    x = 535,500.50

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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.