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Finding the Fourth Proportional to 287,675.20, 431,512.80 and 100,705.60

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Solution

The fourth proportional to 287,675.20, 431,512.80 and 100,705.60 is: 151,058.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,675.20 : 431,512.80 = 100,705.60 : x
  2. Step 2: Convert to fraction form
    287,675.20/431,512.80 = 100,705.60/x
  3. Step 3: Cross multiply
    287,675.20x = 431,512.80 × 100,705.60
  4. Step 4: Simplify right side
    287,675.20x = 43,455,755,431.68
  5. Step 5: Solve for x
    x = 43,455,755,431.68/287,675.20
  6. Step 6: Final answer
    x = 151,058.40

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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.