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Finding the Fourth Proportional to 664,590.63, 917,123.33 and 378,104.57

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Solution

The fourth proportional to 664,590.63, 917,123.33 and 378,104.57 is: 521,777.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,590.63 : 917,123.33 = 378,104.57 : x
  2. Step 2: Convert to fraction form
    664,590.63/917,123.33 = 378,104.57/x
  3. Step 3: Cross multiply
    664,590.63x = 917,123.33 × 378,104.57
  4. Step 4: Simplify right side
    664,590.63x = 346,768,518,686.26
  5. Step 5: Solve for x
    x = 346,768,518,686.26/664,590.63
  6. Step 6: Final answer
    x = 521,777.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.