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Finding the Fourth Proportional to 651.74, 978.06 and 377.60

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Solution

The fourth proportional to 651.74, 978.06 and 377.60 is: 566.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.74 : 978.06 = 377.60 : x
  2. Step 2: Convert to fraction form
    651.74/978.06 = 377.60/x
  3. Step 3: Cross multiply
    651.74x = 978.06 × 377.60
  4. Step 4: Simplify right side
    651.74x = 369,315.46
  5. Step 5: Solve for x
    x = 369,315.46/651.74
  6. Step 6: Final answer
    x = 566.66

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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.