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Finding the Fourth Proportional to 651.61, 978.00 and 623.94

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Solution

The fourth proportional to 651.61, 978.00 and 623.94 is: 936.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.61 : 978.00 = 623.94 : x
  2. Step 2: Convert to fraction form
    651.61/978.00 = 623.94/x
  3. Step 3: Cross multiply
    651.61x = 978.00 × 623.94
  4. Step 4: Simplify right side
    651.61x = 610,208.55
  5. Step 5: Solve for x
    x = 610,208.55/651.61
  6. Step 6: Final answer
    x = 936.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.