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Finding the Fourth Proportional to 409,275.80, 613,913.70 and 209,529.80

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Solution

The fourth proportional to 409,275.80, 613,913.70 and 209,529.80 is: 314,294.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,275.80 : 613,913.70 = 209,529.80 : x
  2. Step 2: Convert to fraction form
    409,275.80/613,913.70 = 209,529.80/x
  3. Step 3: Cross multiply
    409,275.80x = 613,913.70 × 209,529.80
  4. Step 4: Simplify right side
    409,275.80x = 128,633,214,778.26
  5. Step 5: Solve for x
    x = 128,633,214,778.26/409,275.80
  6. Step 6: Final answer
    x = 314,294.70

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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.