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Finding the Fourth Proportional to 553,403.70, 830,105.55 and 483,419.70

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Solution

The fourth proportional to 553,403.70, 830,105.55 and 483,419.70 is: 725,129.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,403.70 : 830,105.55 = 483,419.70 : x
  2. Step 2: Convert to fraction form
    553,403.70/830,105.55 = 483,419.70/x
  3. Step 3: Cross multiply
    553,403.70x = 830,105.55 × 483,419.70
  4. Step 4: Simplify right side
    553,403.70x = 401,289,375,949.34
  5. Step 5: Solve for x
    x = 401,289,375,949.34/553,403.70
  6. Step 6: Final answer
    x = 725,129.55

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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.