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Finding the Fourth Proportional to 288,009.60, 432,014.40 and 271,388.40

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Solution

The fourth proportional to 288,009.60, 432,014.40 and 271,388.40 is: 407,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,009.60 : 432,014.40 = 271,388.40 : x
  2. Step 2: Convert to fraction form
    288,009.60/432,014.40 = 271,388.40/x
  3. Step 3: Cross multiply
    288,009.60x = 432,014.40 × 271,388.40
  4. Step 4: Simplify right side
    288,009.60x = 117,243,696,792.96
  5. Step 5: Solve for x
    x = 117,243,696,792.96/288,009.60
  6. Step 6: Final answer
    x = 407,082.60

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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.