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Finding the Fourth Proportional to 1,283.32, 1,925.01 and 513.82

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Solution

The fourth proportional to 1,283.32, 1,925.01 and 513.82 is: 770.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.32 : 1,925.01 = 513.82 : x
  2. Step 2: Convert to fraction form
    1,283.32/1,925.01 = 513.82/x
  3. Step 3: Cross multiply
    1,283.32x = 1,925.01 × 513.82
  4. Step 4: Simplify right side
    1,283.32x = 989,108.64
  5. Step 5: Solve for x
    x = 989,108.64/1,283.32
  6. Step 6: Final answer
    x = 770.74

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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.