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Finding the Fourth Proportional to 1,407.67, 2,109.18 and 482.72

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Solution

The fourth proportional to 1,407.67, 2,109.18 and 482.72 is: 723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.67 : 2,109.18 = 482.72 : x
  2. Step 2: Convert to fraction form
    1,407.67/2,109.18 = 482.72/x
  3. Step 3: Cross multiply
    1,407.67x = 2,109.18 × 482.72
  4. Step 4: Simplify right side
    1,407.67x = 1,018,134.63
  5. Step 5: Solve for x
    x = 1,018,134.63/1,407.67
  6. Step 6: Final answer
    x = 723.28

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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.