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Finding the Fourth Proportional to 623,920.11, 861,009.92 and 352,045.63

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Solution

The fourth proportional to 623,920.11, 861,009.92 and 352,045.63 is: 485,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,920.11 : 861,009.92 = 352,045.63 : x
  2. Step 2: Convert to fraction form
    623,920.11/861,009.92 = 352,045.63/x
  3. Step 3: Cross multiply
    623,920.11x = 861,009.92 × 352,045.63
  4. Step 4: Simplify right side
    623,920.11x = 303,114,779,722.65
  5. Step 5: Solve for x
    x = 303,114,779,722.65/623,920.11
  6. Step 6: Final answer
    x = 485,823.06

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Double scale
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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.