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Finding the Fourth Proportional to 280,153.91, 386,611.58 and 152,828.59

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Solution

The fourth proportional to 280,153.91, 386,611.58 and 152,828.59 is: 210,903.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,153.91 : 386,611.58 = 152,828.59 : x
  2. Step 2: Convert to fraction form
    280,153.91/386,611.58 = 152,828.59/x
  3. Step 3: Cross multiply
    280,153.91x = 386,611.58 × 152,828.59
  4. Step 4: Simplify right side
    280,153.91x = 59,085,302,649.07
  5. Step 5: Solve for x
    x = 59,085,302,649.07/280,153.91
  6. Step 6: Final answer
    x = 210,903.01

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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.