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Finding the Fourth Proportional to 280,668.16, 387,321.60 and 153,343.72

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Solution

The fourth proportional to 280,668.16, 387,321.60 and 153,343.72 is: 211,614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,668.16 : 387,321.60 = 153,343.72 : x
  2. Step 2: Convert to fraction form
    280,668.16/387,321.60 = 153,343.72/x
  3. Step 3: Cross multiply
    280,668.16x = 387,321.60 × 153,343.72
  4. Step 4: Simplify right side
    280,668.16x = 59,393,334,980.35
  5. Step 5: Solve for x
    x = 59,393,334,980.35/280,668.16
  6. Step 6: Final answer
    x = 211,614.08

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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.