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Finding the Fourth Proportional to 399,400.30, 598,116.30 and 265,555.90

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Solution

The fourth proportional to 399,400.30, 598,116.30 and 265,555.90 is: 397,679.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,400.30 : 598,116.30 = 265,555.90 : x
  2. Step 2: Convert to fraction form
    399,400.30/598,116.30 = 265,555.90/x
  3. Step 3: Cross multiply
    399,400.30x = 598,116.30 × 265,555.90
  4. Step 4: Simplify right side
    399,400.30x = 158,833,312,351.17
  5. Step 5: Solve for x
    x = 158,833,312,351.17/399,400.30
  6. Step 6: Final answer
    x = 397,679.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.