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Finding the Fourth Proportional to 1,639.74, 2,459.92 and 529.45

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Solution

The fourth proportional to 1,639.74, 2,459.92 and 529.45 is: 794.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.74 : 2,459.92 = 529.45 : x
  2. Step 2: Convert to fraction form
    1,639.74/2,459.92 = 529.45/x
  3. Step 3: Cross multiply
    1,639.74x = 2,459.92 × 529.45
  4. Step 4: Simplify right side
    1,639.74x = 1,302,405.51
  5. Step 5: Solve for x
    x = 1,302,405.51/1,639.74
  6. Step 6: Final answer
    x = 794.28

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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.