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Finding the Fourth Proportional to 664,260.48, 916,699.72 and 377,821.84

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Solution

The fourth proportional to 664,260.48, 916,699.72 and 377,821.84 is: 521,405.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,260.48 : 916,699.72 = 377,821.84 : x
  2. Step 2: Convert to fraction form
    664,260.48/916,699.72 = 377,821.84/x
  3. Step 3: Cross multiply
    664,260.48x = 916,699.72 × 377,821.84
  4. Step 4: Simplify right side
    664,260.48x = 346,349,174,937.89
  5. Step 5: Solve for x
    x = 346,349,174,937.89/664,260.48
  6. Step 6: Final answer
    x = 521,405.66

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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.