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Finding the Fourth Proportional to 885,871.80, 1,328,634.90 and 286,687.80

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Solution

The fourth proportional to 885,871.80, 1,328,634.90 and 286,687.80 is: 429,975.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,871.80 : 1,328,634.90 = 286,687.80 : x
  2. Step 2: Convert to fraction form
    885,871.80/1,328,634.90 = 286,687.80/x
  3. Step 3: Cross multiply
    885,871.80x = 1,328,634.90 × 286,687.80
  4. Step 4: Simplify right side
    885,871.80x = 380,903,416,484.22
  5. Step 5: Solve for x
    x = 380,903,416,484.22/885,871.80
  6. Step 6: Final answer
    x = 429,975.78

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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.