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Finding the Fourth Proportional to 316,488.30, 436,680.45 and 187,361.88

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Solution

The fourth proportional to 316,488.30, 436,680.45 and 187,361.88 is: 258,515.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,488.30 : 436,680.45 = 187,361.88 : x
  2. Step 2: Convert to fraction form
    316,488.30/436,680.45 = 187,361.88/x
  3. Step 3: Cross multiply
    316,488.30x = 436,680.45 × 187,361.88
  4. Step 4: Simplify right side
    316,488.30x = 81,817,270,071.25
  5. Step 5: Solve for x
    x = 81,817,270,071.25/316,488.30
  6. Step 6: Final answer
    x = 258,515.94

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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.