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Finding the Fourth Proportional to 458,240.39, 687,420.89 and 170,012.77

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Solution

The fourth proportional to 458,240.39, 687,420.89 and 170,012.77 is: 255,041.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,240.39 : 687,420.89 = 170,012.77 : x
  2. Step 2: Convert to fraction form
    458,240.39/687,420.89 = 170,012.77/x
  3. Step 3: Cross multiply
    458,240.39x = 687,420.89 × 170,012.77
  4. Step 4: Simplify right side
    458,240.39x = 116,870,327,096.15
  5. Step 5: Solve for x
    x = 116,870,327,096.15/458,240.39
  6. Step 6: Final answer
    x = 255,041.53

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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.