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Finding the Fourth Proportional to 403,346.20, 605,019.30 and 383,663.20

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Solution

The fourth proportional to 403,346.20, 605,019.30 and 383,663.20 is: 575,494.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,346.20 : 605,019.30 = 383,663.20 : x
  2. Step 2: Convert to fraction form
    403,346.20/605,019.30 = 383,663.20/x
  3. Step 3: Cross multiply
    403,346.20x = 605,019.30 × 383,663.20
  4. Step 4: Simplify right side
    403,346.20x = 232,123,640,699.76
  5. Step 5: Solve for x
    x = 232,123,640,699.76/403,346.20
  6. Step 6: Final answer
    x = 575,494.80

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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.