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Finding the Fourth Proportional to 2,925.74, 4,388.13 and 977.94

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Solution

The fourth proportional to 2,925.74, 4,388.13 and 977.94 is: 1,466.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,925.74 : 4,388.13 = 977.94 : x
  2. Step 2: Convert to fraction form
    2,925.74/4,388.13 = 977.94/x
  3. Step 3: Cross multiply
    2,925.74x = 4,388.13 × 977.94
  4. Step 4: Simplify right side
    2,925.74x = 4,291,327.85
  5. Step 5: Solve for x
    x = 4,291,327.85/2,925.74
  6. Step 6: Final answer
    x = 1,466.75

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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.