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Finding the Fourth Proportional to 380,764.53, 525,472.11 and 210,987.72

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Solution

The fourth proportional to 380,764.53, 525,472.11 and 210,987.72 is: 291,172.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,764.53 : 525,472.11 = 210,987.72 : x
  2. Step 2: Convert to fraction form
    380,764.53/525,472.11 = 210,987.72/x
  3. Step 3: Cross multiply
    380,764.53x = 525,472.11 × 210,987.72
  4. Step 4: Simplify right side
    380,764.53x = 110,868,162,412.49
  5. Step 5: Solve for x
    x = 110,868,162,412.49/380,764.53
  6. Step 6: Final answer
    x = 291,172.51

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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.