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Finding the Fourth Proportional to 280,557.81, 387,169.78 and 153,233.71

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Solution

The fourth proportional to 280,557.81, 387,169.78 and 153,233.71 is: 211,462.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,557.81 : 387,169.78 = 153,233.71 : x
  2. Step 2: Convert to fraction form
    280,557.81/387,169.78 = 153,233.71/x
  3. Step 3: Cross multiply
    280,557.81x = 387,169.78 × 153,233.71
  4. Step 4: Simplify right side
    280,557.81x = 59,327,461,789.28
  5. Step 5: Solve for x
    x = 59,327,461,789.28/280,557.81
  6. Step 6: Final answer
    x = 211,462.52

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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.