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Finding the Fourth Proportional to 612,169.40, 918,254.10 and 514,191.80

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Solution

The fourth proportional to 612,169.40, 918,254.10 and 514,191.80 is: 771,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,169.40 : 918,254.10 = 514,191.80 : x
  2. Step 2: Convert to fraction form
    612,169.40/918,254.10 = 514,191.80/x
  3. Step 3: Cross multiply
    612,169.40x = 918,254.10 × 514,191.80
  4. Step 4: Simplify right side
    612,169.40x = 472,158,728,536.38
  5. Step 5: Solve for x
    x = 472,158,728,536.38/612,169.40
  6. Step 6: Final answer
    x = 771,287.70

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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.