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Finding the Fourth Proportional to 318,378.90, 439,395 and 182,430.81

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Solution

The fourth proportional to 318,378.90, 439,395 and 182,430.81 is: 251,772.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,378.90 : 439,395 = 182,430.81 : x
  2. Step 2: Convert to fraction form
    318,378.90/439,395 = 182,430.81/x
  3. Step 3: Cross multiply
    318,378.90x = 439,395 × 182,430.81
  4. Step 4: Simplify right side
    318,378.90x = 80,159,185,759.95
  5. Step 5: Solve for x
    x = 80,159,185,759.95/318,378.90
  6. Step 6: Final answer
    x = 251,772.92

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1.5x scale

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.