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Finding the Fourth Proportional to 1,265.84, 1,899.36 and 535.40

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Solution

The fourth proportional to 1,265.84, 1,899.36 and 535.40 is: 803.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.84 : 1,899.36 = 535.40 : x
  2. Step 2: Convert to fraction form
    1,265.84/1,899.36 = 535.40/x
  3. Step 3: Cross multiply
    1,265.84x = 1,899.36 × 535.40
  4. Step 4: Simplify right side
    1,265.84x = 1,016,917.34
  5. Step 5: Solve for x
    x = 1,016,917.34/1,265.84
  6. Step 6: Final answer
    x = 803.35

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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.