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Finding the Fourth Proportional to 287,994.60, 431,991.90 and 162,023.40

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Solution

The fourth proportional to 287,994.60, 431,991.90 and 162,023.40 is: 243,035.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,994.60 : 431,991.90 = 162,023.40 : x
  2. Step 2: Convert to fraction form
    287,994.60/431,991.90 = 162,023.40/x
  3. Step 3: Cross multiply
    287,994.60x = 431,991.90 × 162,023.40
  4. Step 4: Simplify right side
    287,994.60x = 69,992,796,410.46
  5. Step 5: Solve for x
    x = 69,992,796,410.46/287,994.60
  6. Step 6: Final answer
    x = 243,035.10

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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.