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Finding the Fourth Proportional to 885,980.32, 1,328,989.32 and 317,398.42

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Solution

The fourth proportional to 885,980.32, 1,328,989.32 and 317,398.42 is: 476,104.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,980.32 : 1,328,989.32 = 317,398.42 : x
  2. Step 2: Convert to fraction form
    885,980.32/1,328,989.32 = 317,398.42/x
  3. Step 3: Cross multiply
    885,980.32x = 1,328,989.32 × 317,398.42
  4. Step 4: Simplify right side
    885,980.32x = 421,819,110,364.87
  5. Step 5: Solve for x
    x = 421,819,110,364.87/885,980.32
  6. Step 6: Final answer
    x = 476,104.38

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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.