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Finding the Fourth Proportional to 659,136.53, 909,615.57 and 387,215.88

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Solution

The fourth proportional to 659,136.53, 909,615.57 and 387,215.88 is: 534,362.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,136.53 : 909,615.57 = 387,215.88 : x
  2. Step 2: Convert to fraction form
    659,136.53/909,615.57 = 387,215.88/x
  3. Step 3: Cross multiply
    659,136.53x = 909,615.57 × 387,215.88
  4. Step 4: Simplify right side
    659,136.53x = 352,217,593,399.25
  5. Step 5: Solve for x
    x = 352,217,593,399.25/659,136.53
  6. Step 6: Final answer
    x = 534,362.12

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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.