Home / 781,689.20-1,079,404.33-491,783.98

Finding the Fourth Proportional to 781,689.20, 1,079,404.33 and 491,783.98

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Solution

The fourth proportional to 781,689.20, 1,079,404.33 and 491,783.98 is: 679,085.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,689.20 : 1,079,404.33 = 491,783.98 : x
  2. Step 2: Convert to fraction form
    781,689.20/1,079,404.33 = 491,783.98/x
  3. Step 3: Cross multiply
    781,689.20x = 1,079,404.33 × 491,783.98
  4. Step 4: Simplify right side
    781,689.20x = 530,833,757,436.63
  5. Step 5: Solve for x
    x = 530,833,757,436.63/781,689.20
  6. Step 6: Final answer
    x = 679,085.44

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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.