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Finding the Fourth Proportional to 316,571.88, 436,904.20 and 180,639.30

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Solution

The fourth proportional to 316,571.88, 436,904.20 and 180,639.30 is: 249,302.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,571.88 : 436,904.20 = 180,639.30 : x
  2. Step 2: Convert to fraction form
    316,571.88/436,904.20 = 180,639.30/x
  3. Step 3: Cross multiply
    316,571.88x = 436,904.20 × 180,639.30
  4. Step 4: Simplify right side
    316,571.88x = 78,922,068,855.06
  5. Step 5: Solve for x
    x = 78,922,068,855.06/316,571.88
  6. Step 6: Final answer
    x = 249,302.21

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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.