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Finding the Fourth Proportional to 930.45, 1,284.07 and 510.80

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Solution

The fourth proportional to 930.45, 1,284.07 and 510.80 is: 704.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.45 : 1,284.07 = 510.80 : x
  2. Step 2: Convert to fraction form
    930.45/1,284.07 = 510.80/x
  3. Step 3: Cross multiply
    930.45x = 1,284.07 × 510.80
  4. Step 4: Simplify right side
    930.45x = 655,908.08
  5. Step 5: Solve for x
    x = 655,908.08/930.45
  6. Step 6: Final answer
    x = 704.93

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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.