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Finding the Fourth Proportional to 648.79, 973.95 and 511.93

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Solution

The fourth proportional to 648.79, 973.95 and 511.93 is: 768.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.79 : 973.95 = 511.93 : x
  2. Step 2: Convert to fraction form
    648.79/973.95 = 511.93/x
  3. Step 3: Cross multiply
    648.79x = 973.95 × 511.93
  4. Step 4: Simplify right side
    648.79x = 498,591.79
  5. Step 5: Solve for x
    x = 498,591.79/648.79
  6. Step 6: Final answer
    x = 768.50

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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.