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Finding the Fourth Proportional to 675,132.90, 931,771.53 and 388,665.06

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Solution

The fourth proportional to 675,132.90, 931,771.53 and 388,665.06 is: 536,408.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,132.90 : 931,771.53 = 388,665.06 : x
  2. Step 2: Convert to fraction form
    675,132.90/931,771.53 = 388,665.06/x
  3. Step 3: Cross multiply
    675,132.90x = 931,771.53 × 388,665.06
  4. Step 4: Simplify right side
    675,132.90x = 362,147,037,613.74
  5. Step 5: Solve for x
    x = 362,147,037,613.74/675,132.90
  6. Step 6: Final answer
    x = 536,408.52

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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.