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Finding the Fourth Proportional to 289,311.40, 433,967.10 and 219,327.40

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Solution

The fourth proportional to 289,311.40, 433,967.10 and 219,327.40 is: 328,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,311.40 : 433,967.10 = 219,327.40 : x
  2. Step 2: Convert to fraction form
    289,311.40/433,967.10 = 219,327.40/x
  3. Step 3: Cross multiply
    289,311.40x = 433,967.10 × 219,327.40
  4. Step 4: Simplify right side
    289,311.40x = 95,180,875,728.54
  5. Step 5: Solve for x
    x = 95,180,875,728.54/289,311.40
  6. Step 6: Final answer
    x = 328,991.10

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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.