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Finding the Fourth Proportional to 885,830.80, 1,328,530.20 and 254,678.80

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Solution

The fourth proportional to 885,830.80, 1,328,530.20 and 254,678.80 is: 381,956.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,830.80 : 1,328,530.20 = 254,678.80 : x
  2. Step 2: Convert to fraction form
    885,830.80/1,328,530.20 = 254,678.80/x
  3. Step 3: Cross multiply
    885,830.80x = 1,328,530.20 × 254,678.80
  4. Step 4: Simplify right side
    885,830.80x = 338,348,477,099.76
  5. Step 5: Solve for x
    x = 338,348,477,099.76/885,830.80
  6. Step 6: Final answer
    x = 381,956.10

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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.