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Finding the Fourth Proportional to 458,679.60, 688,019.40 and 121,719.60

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Solution

The fourth proportional to 458,679.60, 688,019.40 and 121,719.60 is: 182,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,679.60 : 688,019.40 = 121,719.60 : x
  2. Step 2: Convert to fraction form
    458,679.60/688,019.40 = 121,719.60/x
  3. Step 3: Cross multiply
    458,679.60x = 688,019.40 × 121,719.60
  4. Step 4: Simplify right side
    458,679.60x = 83,745,446,160.24
  5. Step 5: Solve for x
    x = 83,745,446,160.24/458,679.60
  6. Step 6: Final answer
    x = 182,579.40

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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.