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Finding the Fourth Proportional to 815,812.80, 1,125,696.60 and 453,230.88

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Solution

The fourth proportional to 815,812.80, 1,125,696.60 and 453,230.88 is: 625,389.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,812.80 : 1,125,696.60 = 453,230.88 : x
  2. Step 2: Convert to fraction form
    815,812.80/1,125,696.60 = 453,230.88/x
  3. Step 3: Cross multiply
    815,812.80x = 1,125,696.60 × 453,230.88
  4. Step 4: Simplify right side
    815,812.80x = 510,200,460,631.01
  5. Step 5: Solve for x
    x = 510,200,460,631.01/815,812.80
  6. Step 6: Final answer
    x = 625,389.13

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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.