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Finding the Fourth Proportional to 787,308.40, 1,086,483 and 447,756.40

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Solution

The fourth proportional to 787,308.40, 1,086,483 and 447,756.40 is: 617,902.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,308.40 : 1,086,483 = 447,756.40 : x
  2. Step 2: Convert to fraction form
    787,308.40/1,086,483 = 447,756.40/x
  3. Step 3: Cross multiply
    787,308.40x = 1,086,483 × 447,756.40
  4. Step 4: Simplify right side
    787,308.40x = 486,479,716,741.20
  5. Step 5: Solve for x
    x = 486,479,716,741.20/787,308.40
  6. Step 6: Final answer
    x = 617,902.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.