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Finding the Fourth Proportional to 406,858.80, 610,142.40 and 207,112.80

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Solution

The fourth proportional to 406,858.80, 610,142.40 and 207,112.80 is: 310,594.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,858.80 : 610,142.40 = 207,112.80 : x
  2. Step 2: Convert to fraction form
    406,858.80/610,142.40 = 207,112.80/x
  3. Step 3: Cross multiply
    406,858.80x = 610,142.40 × 207,112.80
  4. Step 4: Simplify right side
    406,858.80x = 126,368,300,862.72
  5. Step 5: Solve for x
    x = 126,368,300,862.72/406,858.80
  6. Step 6: Final answer
    x = 310,594.98

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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.