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Finding the Fourth Proportional to 619.86, 926.36 and 555.62

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Solution

The fourth proportional to 619.86, 926.36 and 555.62 is: 830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.86 : 926.36 = 555.62 : x
  2. Step 2: Convert to fraction form
    619.86/926.36 = 555.62/x
  3. Step 3: Cross multiply
    619.86x = 926.36 × 555.62
  4. Step 4: Simplify right side
    619.86x = 514,696.73
  5. Step 5: Solve for x
    x = 514,696.73/619.86
  6. Step 6: Final answer
    x = 830.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.