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Finding the Fourth Proportional to 437,066.80, 655,600.20 and 318,968.80

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Solution

The fourth proportional to 437,066.80, 655,600.20 and 318,968.80 is: 478,453.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,066.80 : 655,600.20 = 318,968.80 : x
  2. Step 2: Convert to fraction form
    437,066.80/655,600.20 = 318,968.80/x
  3. Step 3: Cross multiply
    437,066.80x = 655,600.20 × 318,968.80
  4. Step 4: Simplify right side
    437,066.80x = 209,116,009,073.76
  5. Step 5: Solve for x
    x = 209,116,009,073.76/437,066.80
  6. Step 6: Final answer
    x = 478,453.20

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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.