Home / 285,278.78-393,689.55-156,215.18

Finding the Fourth Proportional to 285,278.78, 393,689.55 and 156,215.18

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Solution

The fourth proportional to 285,278.78, 393,689.55 and 156,215.18 is: 215,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,278.78 : 393,689.55 = 156,215.18 : x
  2. Step 2: Convert to fraction form
    285,278.78/393,689.55 = 156,215.18/x
  3. Step 3: Cross multiply
    285,278.78x = 393,689.55 × 156,215.18
  4. Step 4: Simplify right side
    285,278.78x = 61,500,283,917.37
  5. Step 5: Solve for x
    x = 61,500,283,917.37/285,278.78
  6. Step 6: Final answer
    x = 215,579.60

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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.