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Finding the Fourth Proportional to 620,538.30, 930,807.45 and 221,192.10

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Solution

The fourth proportional to 620,538.30, 930,807.45 and 221,192.10 is: 331,788.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,538.30 : 930,807.45 = 221,192.10 : x
  2. Step 2: Convert to fraction form
    620,538.30/930,807.45 = 221,192.10/x
  3. Step 3: Cross multiply
    620,538.30x = 930,807.45 × 221,192.10
  4. Step 4: Simplify right side
    620,538.30x = 205,887,254,561.15
  5. Step 5: Solve for x
    x = 205,887,254,561.15/620,538.30
  6. Step 6: Final answer
    x = 331,788.15

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Similar ratio
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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.