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Finding the Fourth Proportional to 488,386.40, 732,579.60 and 311,020.70

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Solution

The fourth proportional to 488,386.40, 732,579.60 and 311,020.70 is: 466,531.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,386.40 : 732,579.60 = 311,020.70 : x
  2. Step 2: Convert to fraction form
    488,386.40/732,579.60 = 311,020.70/x
  3. Step 3: Cross multiply
    488,386.40x = 732,579.60 × 311,020.70
  4. Step 4: Simplify right side
    488,386.40x = 227,847,419,997.72
  5. Step 5: Solve for x
    x = 227,847,419,997.72/488,386.40
  6. Step 6: Final answer
    x = 466,531.05

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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.