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Finding the Fourth Proportional to 406,986.80, 610,480.20 and 281,015.60

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Solution

The fourth proportional to 406,986.80, 610,480.20 and 281,015.60 is: 421,523.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,986.80 : 610,480.20 = 281,015.60 : x
  2. Step 2: Convert to fraction form
    406,986.80/610,480.20 = 281,015.60/x
  3. Step 3: Cross multiply
    406,986.80x = 610,480.20 × 281,015.60
  4. Step 4: Simplify right side
    406,986.80x = 171,554,459,691.12
  5. Step 5: Solve for x
    x = 171,554,459,691.12/406,986.80
  6. Step 6: Final answer
    x = 421,523.40

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1.5x scale

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.