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Finding the Fourth Proportional to 669,784.80, 1,004,787.90 and 310,314.90

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Solution

The fourth proportional to 669,784.80, 1,004,787.90 and 310,314.90 is: 465,523.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,784.80 : 1,004,787.90 = 310,314.90 : x
  2. Step 2: Convert to fraction form
    669,784.80/1,004,787.90 = 310,314.90/x
  3. Step 3: Cross multiply
    669,784.80x = 1,004,787.90 × 310,314.90
  4. Step 4: Simplify right side
    669,784.80x = 311,800,656,709.71
  5. Step 5: Solve for x
    x = 311,800,656,709.71/669,784.80
  6. Step 6: Final answer
    x = 465,523.64

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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.