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Finding the Fourth Proportional to 287,786.40, 431,679.60 and 182,810.40

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Solution

The fourth proportional to 287,786.40, 431,679.60 and 182,810.40 is: 274,215.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,786.40 : 431,679.60 = 182,810.40 : x
  2. Step 2: Convert to fraction form
    287,786.40/431,679.60 = 182,810.40/x
  3. Step 3: Cross multiply
    287,786.40x = 431,679.60 × 182,810.40
  4. Step 4: Simplify right side
    287,786.40x = 78,915,520,347.84
  5. Step 5: Solve for x
    x = 78,915,520,347.84/287,786.40
  6. Step 6: Final answer
    x = 274,215.60

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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.