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Finding the Fourth Proportional to 630.66, 948.18 and 509.76

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Solution

The fourth proportional to 630.66, 948.18 and 509.76 is: 766.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.66 : 948.18 = 509.76 : x
  2. Step 2: Convert to fraction form
    630.66/948.18 = 509.76/x
  3. Step 3: Cross multiply
    630.66x = 948.18 × 509.76
  4. Step 4: Simplify right side
    630.66x = 483,344.24
  5. Step 5: Solve for x
    x = 483,344.24/630.66
  6. Step 6: Final answer
    x = 766.41

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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.