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Finding the Fourth Proportional to 1,415.06, 2,121.28 and 537.30

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Solution

The fourth proportional to 1,415.06, 2,121.28 and 537.30 is: 805.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.06 : 2,121.28 = 537.30 : x
  2. Step 2: Convert to fraction form
    1,415.06/2,121.28 = 537.30/x
  3. Step 3: Cross multiply
    1,415.06x = 2,121.28 × 537.30
  4. Step 4: Simplify right side
    1,415.06x = 1,139,752.70
  5. Step 5: Solve for x
    x = 1,139,752.70/1,415.06
  6. Step 6: Final answer
    x = 805.45

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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.