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Finding the Fourth Proportional to 707,214.42, 976,391.94 and 486,828

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Solution

The fourth proportional to 707,214.42, 976,391.94 and 486,828 is: 672,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,214.42 : 976,391.94 = 486,828 : x
  2. Step 2: Convert to fraction form
    707,214.42/976,391.94 = 486,828/x
  3. Step 3: Cross multiply
    707,214.42x = 976,391.94 × 486,828
  4. Step 4: Simplify right side
    707,214.42x = 475,334,935,366.32
  5. Step 5: Solve for x
    x = 475,334,935,366.32/707,214.42
  6. Step 6: Final answer
    x = 672,122.80

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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.