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Finding the Fourth Proportional to 930.30, 1,283.81 and 510.64

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Solution

The fourth proportional to 930.30, 1,283.81 and 510.64 is: 704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.30 : 1,283.81 = 510.64 : x
  2. Step 2: Convert to fraction form
    930.30/1,283.81 = 510.64/x
  3. Step 3: Cross multiply
    930.30x = 1,283.81 × 510.64
  4. Step 4: Simplify right side
    930.30x = 655,564.74
  5. Step 5: Solve for x
    x = 655,564.74/930.30
  6. Step 6: Final answer
    x = 704.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.