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Finding the Fourth Proportional to 458,853.60, 687,944.88 and 308,720.64

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Solution

The fourth proportional to 458,853.60, 687,944.88 and 308,720.64 is: 462,855.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,853.60 : 687,944.88 = 308,720.64 : x
  2. Step 2: Convert to fraction form
    458,853.60/687,944.88 = 308,720.64/x
  3. Step 3: Cross multiply
    458,853.60x = 687,944.88 × 308,720.64
  4. Step 4: Simplify right side
    458,853.60x = 212,382,783,638.32
  5. Step 5: Solve for x
    x = 212,382,783,638.32/458,853.60
  6. Step 6: Final answer
    x = 462,855.22

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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.