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Finding the Fourth Proportional to 640,328.28, 960,457.64 and 324,776.92

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Solution

The fourth proportional to 640,328.28, 960,457.64 and 324,776.92 is: 487,147.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,328.28 : 960,457.64 = 324,776.92 : x
  2. Step 2: Convert to fraction form
    640,328.28/960,457.64 = 324,776.92/x
  3. Step 3: Cross multiply
    640,328.28x = 960,457.64 × 324,776.92
  4. Step 4: Simplify right side
    640,328.28x = 311,934,474,109.67
  5. Step 5: Solve for x
    x = 311,934,474,109.67/640,328.28
  6. Step 6: Final answer
    x = 487,147.74

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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.