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Finding the Fourth Proportional to 1,754.55, 2,421.05 and 1,008.40

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Solution

The fourth proportional to 1,754.55, 2,421.05 and 1,008.40 is: 1,391.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,754.55 : 2,421.05 = 1,008.40 : x
  2. Step 2: Convert to fraction form
    1,754.55/2,421.05 = 1,008.40/x
  3. Step 3: Cross multiply
    1,754.55x = 2,421.05 × 1,008.40
  4. Step 4: Simplify right side
    1,754.55x = 2,441,386.82
  5. Step 5: Solve for x
    x = 2,441,386.82/1,754.55
  6. Step 6: Final answer
    x = 1,391.46

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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.