Home / 686,746.56-1,029,792.96-213,438.72

Finding the Fourth Proportional to 686,746.56, 1,029,792.96 and 213,438.72

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Solution

The fourth proportional to 686,746.56, 1,029,792.96 and 213,438.72 is: 320,056.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,746.56 : 1,029,792.96 = 213,438.72 : x
  2. Step 2: Convert to fraction form
    686,746.56/1,029,792.96 = 213,438.72/x
  3. Step 3: Cross multiply
    686,746.56x = 1,029,792.96 × 213,438.72
  4. Step 4: Simplify right side
    686,746.56x = 219,797,691,247.41
  5. Step 5: Solve for x
    x = 219,797,691,247.41/686,746.56
  6. Step 6: Final answer
    x = 320,056.49

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1.5x scale

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.