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Finding the Fourth Proportional to 287,546.60, 431,319.90 and 163,130.60

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Solution

The fourth proportional to 287,546.60, 431,319.90 and 163,130.60 is: 244,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,546.60 : 431,319.90 = 163,130.60 : x
  2. Step 2: Convert to fraction form
    287,546.60/431,319.90 = 163,130.60/x
  3. Step 3: Cross multiply
    287,546.60x = 431,319.90 × 163,130.60
  4. Step 4: Simplify right side
    287,546.60x = 70,361,474,078.94
  5. Step 5: Solve for x
    x = 70,361,474,078.94/287,546.60
  6. Step 6: Final answer
    x = 244,695.90

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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.