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Finding the Fourth Proportional to 538,872.80, 808,309.20 and 328,920.80

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Solution

The fourth proportional to 538,872.80, 808,309.20 and 328,920.80 is: 493,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,872.80 : 808,309.20 = 328,920.80 : x
  2. Step 2: Convert to fraction form
    538,872.80/808,309.20 = 328,920.80/x
  3. Step 3: Cross multiply
    538,872.80x = 808,309.20 × 328,920.80
  4. Step 4: Simplify right side
    538,872.80x = 265,869,708,711.36
  5. Step 5: Solve for x
    x = 265,869,708,711.36/538,872.80
  6. Step 6: Final answer
    x = 493,381.20

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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.