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Finding the Fourth Proportional to 498,420.06, 687,810.90 and 283,555.54

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Solution

The fourth proportional to 498,420.06, 687,810.90 and 283,555.54 is: 391,301.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,420.06 : 687,810.90 = 283,555.54 : x
  2. Step 2: Convert to fraction form
    498,420.06/687,810.90 = 283,555.54/x
  3. Step 3: Cross multiply
    498,420.06x = 687,810.90 × 283,555.54
  4. Step 4: Simplify right side
    498,420.06x = 195,032,591,167.39
  5. Step 5: Solve for x
    x = 195,032,591,167.39/498,420.06
  6. Step 6: Final answer
    x = 391,301.65

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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.