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Finding the Fourth Proportional to 621,461.40, 932,192.10 and 385,265.40

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Solution

The fourth proportional to 621,461.40, 932,192.10 and 385,265.40 is: 577,898.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,461.40 : 932,192.10 = 385,265.40 : x
  2. Step 2: Convert to fraction form
    621,461.40/932,192.10 = 385,265.40/x
  3. Step 3: Cross multiply
    621,461.40x = 932,192.10 × 385,265.40
  4. Step 4: Simplify right side
    621,461.40x = 359,141,362,283.34
  5. Step 5: Solve for x
    x = 359,141,362,283.34/621,461.40
  6. Step 6: Final answer
    x = 577,898.10

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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.