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Finding the Fourth Proportional to 406,989.20, 610,483.80 and 185,805.20

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Solution

The fourth proportional to 406,989.20, 610,483.80 and 185,805.20 is: 278,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,989.20 : 610,483.80 = 185,805.20 : x
  2. Step 2: Convert to fraction form
    406,989.20/610,483.80 = 185,805.20/x
  3. Step 3: Cross multiply
    406,989.20x = 610,483.80 × 185,805.20
  4. Step 4: Simplify right side
    406,989.20x = 113,431,064,555.76
  5. Step 5: Solve for x
    x = 113,431,064,555.76/406,989.20
  6. Step 6: Final answer
    x = 278,707.80

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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.