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Finding the Fourth Proportional to 707,679.40, 976,603.89 and 385,390.93

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Solution

The fourth proportional to 707,679.40, 976,603.89 and 385,390.93 is: 531,842.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,679.40 : 976,603.89 = 385,390.93 : x
  2. Step 2: Convert to fraction form
    707,679.40/976,603.89 = 385,390.93/x
  3. Step 3: Cross multiply
    707,679.40x = 976,603.89 × 385,390.93
  4. Step 4: Simplify right side
    707,679.40x = 376,374,281,408.72
  5. Step 5: Solve for x
    x = 376,374,281,408.72/707,679.40
  6. Step 6: Final answer
    x = 531,842.92

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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.