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Finding the Fourth Proportional to 612,197.40, 918,296.10 and 257,093.40

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Solution

The fourth proportional to 612,197.40, 918,296.10 and 257,093.40 is: 385,640.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,197.40 : 918,296.10 = 257,093.40 : x
  2. Step 2: Convert to fraction form
    612,197.40/918,296.10 = 257,093.40/x
  3. Step 3: Cross multiply
    612,197.40x = 918,296.10 × 257,093.40
  4. Step 4: Simplify right side
    612,197.40x = 236,087,866,555.74
  5. Step 5: Solve for x
    x = 236,087,866,555.74/612,197.40
  6. Step 6: Final answer
    x = 385,640.10

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Double scale
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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.