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Finding the Fourth Proportional to 718,194.65, 991,115.51 and 395,916.26

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Solution

The fourth proportional to 718,194.65, 991,115.51 and 395,916.26 is: 546,368.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,194.65 : 991,115.51 = 395,916.26 : x
  2. Step 2: Convert to fraction form
    718,194.65/991,115.51 = 395,916.26/x
  3. Step 3: Cross multiply
    718,194.65x = 991,115.51 × 395,916.26
  4. Step 4: Simplify right side
    718,194.65x = 392,398,739,012.03
  5. Step 5: Solve for x
    x = 392,398,739,012.03/718,194.65
  6. Step 6: Final answer
    x = 546,368.23

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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.