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Finding the Fourth Proportional to 487,638.51, 673,076.42 and 283,728.83

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Solution

The fourth proportional to 487,638.51, 673,076.42 and 283,728.83 is: 391,624.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,638.51 : 673,076.42 = 283,728.83 : x
  2. Step 2: Convert to fraction form
    487,638.51/673,076.42 = 283,728.83/x
  3. Step 3: Cross multiply
    487,638.51x = 673,076.42 × 283,728.83
  4. Step 4: Simplify right side
    487,638.51x = 190,971,180,363.16
  5. Step 5: Solve for x
    x = 190,971,180,363.16/487,638.51
  6. Step 6: Final answer
    x = 391,624.49

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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.