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Finding the Fourth Proportional to 440,439.60, 660,659.40 and 408,946.80

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Solution

The fourth proportional to 440,439.60, 660,659.40 and 408,946.80 is: 613,420.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,439.60 : 660,659.40 = 408,946.80 : x
  2. Step 2: Convert to fraction form
    440,439.60/660,659.40 = 408,946.80/x
  3. Step 3: Cross multiply
    440,439.60x = 660,659.40 × 408,946.80
  4. Step 4: Simplify right side
    440,439.60x = 270,174,547,519.92
  5. Step 5: Solve for x
    x = 270,174,547,519.92/440,439.60
  6. Step 6: Final answer
    x = 613,420.20

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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.