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Finding the Fourth Proportional to 660,115.20, 990,561.60 and 436,123.20

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Solution

The fourth proportional to 660,115.20, 990,561.60 and 436,123.20 is: 654,441.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,115.20 : 990,561.60 = 436,123.20 : x
  2. Step 2: Convert to fraction form
    660,115.20/990,561.60 = 436,123.20/x
  3. Step 3: Cross multiply
    660,115.20x = 990,561.60 × 436,123.20
  4. Step 4: Simplify right side
    660,115.20x = 432,006,894,789.12
  5. Step 5: Solve for x
    x = 432,006,894,789.12/660,115.20
  6. Step 6: Final answer
    x = 654,441.67

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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.