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Finding the Fourth Proportional to 285,368.40, 393,808.23 and 158,043.87

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Solution

The fourth proportional to 285,368.40, 393,808.23 and 158,043.87 is: 218,100.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,368.40 : 393,808.23 = 158,043.87 : x
  2. Step 2: Convert to fraction form
    285,368.40/393,808.23 = 158,043.87/x
  3. Step 3: Cross multiply
    285,368.40x = 393,808.23 × 158,043.87
  4. Step 4: Simplify right side
    285,368.40x = 62,238,976,707.05
  5. Step 5: Solve for x
    x = 62,238,976,707.05/285,368.40
  6. Step 6: Final answer
    x = 218,100.45

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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.