Home / 285,279.78-393,690.93-156,216.18

Finding the Fourth Proportional to 285,279.78, 393,690.93 and 156,216.18

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Solution

The fourth proportional to 285,279.78, 393,690.93 and 156,216.18 is: 215,580.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,279.78 : 393,690.93 = 156,216.18 : x
  2. Step 2: Convert to fraction form
    285,279.78/393,690.93 = 156,216.18/x
  3. Step 3: Cross multiply
    285,279.78x = 393,690.93 × 156,216.18
  4. Step 4: Simplify right side
    285,279.78x = 61,500,893,185.25
  5. Step 5: Solve for x
    x = 61,500,893,185.25/285,279.78
  6. Step 6: Final answer
    x = 215,580.98

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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.