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Finding the Fourth Proportional to 280,605.83, 387,229.75 and 153,281.93

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Solution

The fourth proportional to 280,605.83, 387,229.75 and 153,281.93 is: 211,525.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,605.83 : 387,229.75 = 153,281.93 : x
  2. Step 2: Convert to fraction form
    280,605.83/387,229.75 = 153,281.93/x
  3. Step 3: Cross multiply
    280,605.83x = 387,229.75 × 153,281.93
  4. Step 4: Simplify right side
    280,605.83x = 59,355,321,114.06
  5. Step 5: Solve for x
    x = 59,355,321,114.06/280,605.83
  6. Step 6: Final answer
    x = 211,525.62

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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.