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Finding the Fourth Proportional to 406,991.20, 610,486.80 and 346,856.80

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Solution

The fourth proportional to 406,991.20, 610,486.80 and 346,856.80 is: 520,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,991.20 : 610,486.80 = 346,856.80 : x
  2. Step 2: Convert to fraction form
    406,991.20/610,486.80 = 346,856.80/x
  3. Step 3: Cross multiply
    406,991.20x = 610,486.80 × 346,856.80
  4. Step 4: Simplify right side
    406,991.20x = 211,751,497,890.24
  5. Step 5: Solve for x
    x = 211,751,497,890.24/406,991.20
  6. Step 6: Final answer
    x = 520,285.20

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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.