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Finding the Fourth Proportional to 458,323.25, 687,503.51 and 218,313.77

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Solution

The fourth proportional to 458,323.25, 687,503.51 and 218,313.77 is: 327,479.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,323.25 : 687,503.51 = 218,313.77 : x
  2. Step 2: Convert to fraction form
    458,323.25/687,503.51 = 218,313.77/x
  3. Step 3: Cross multiply
    458,323.25x = 687,503.51 × 218,313.77
  4. Step 4: Simplify right side
    458,323.25x = 150,091,482,064.76
  5. Step 5: Solve for x
    x = 150,091,482,064.76/458,323.25
  6. Step 6: Final answer
    x = 327,479.53

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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.