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Finding the Fourth Proportional to 487,891.84, 673,202.18 and 281,128

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Solution

The fourth proportional to 487,891.84, 673,202.18 and 281,128 is: 387,905.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,891.84 : 673,202.18 = 281,128 : x
  2. Step 2: Convert to fraction form
    487,891.84/673,202.18 = 281,128/x
  3. Step 3: Cross multiply
    487,891.84x = 673,202.18 × 281,128
  4. Step 4: Simplify right side
    487,891.84x = 189,255,982,459.04
  5. Step 5: Solve for x
    x = 189,255,982,459.04/487,891.84
  6. Step 6: Final answer
    x = 387,905.61

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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.