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Finding the Fourth Proportional to 1,404.06, 2,106.40 and 538.38

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Solution

The fourth proportional to 1,404.06, 2,106.40 and 538.38 is: 807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,404.06 : 2,106.40 = 538.38 : x
  2. Step 2: Convert to fraction form
    1,404.06/2,106.40 = 538.38/x
  3. Step 3: Cross multiply
    1,404.06x = 2,106.40 × 538.38
  4. Step 4: Simplify right side
    1,404.06x = 1,134,043.63
  5. Step 5: Solve for x
    x = 1,134,043.63/1,404.06
  6. Step 6: Final answer
    x = 807.69

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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.