Home / 1,287,540-1,931,383.80-340,886.12

Finding the Fourth Proportional to 1,287,540, 1,931,383.80 and 340,886.12

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Solution

The fourth proportional to 1,287,540, 1,931,383.80 and 340,886.12 is: 511,348.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,540 : 1,931,383.80 = 340,886.12 : x
  2. Step 2: Convert to fraction form
    1,287,540/1,931,383.80 = 340,886.12/x
  3. Step 3: Cross multiply
    1,287,540x = 1,931,383.80 × 340,886.12
  4. Step 4: Simplify right side
    1,287,540x = 658,381,929,812.86
  5. Step 5: Solve for x
    x = 658,381,929,812.86/1,287,540
  6. Step 6: Final answer
    x = 511,348.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.