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Finding the Fourth Proportional to 521.77, 780.34 and 464.40

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Solution

The fourth proportional to 521.77, 780.34 and 464.40 is: 694.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.77 : 780.34 = 464.40 : x
  2. Step 2: Convert to fraction form
    521.77/780.34 = 464.40/x
  3. Step 3: Cross multiply
    521.77x = 780.34 × 464.40
  4. Step 4: Simplify right side
    521.77x = 362,389.90
  5. Step 5: Solve for x
    x = 362,389.90/521.77
  6. Step 6: Final answer
    x = 694.54

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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.