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Finding the Fourth Proportional to 657,398.58, 986,245.65 and 208,146.30

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Solution

The fourth proportional to 657,398.58, 986,245.65 and 208,146.30 is: 312,266.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,398.58 : 986,245.65 = 208,146.30 : x
  2. Step 2: Convert to fraction form
    657,398.58/986,245.65 = 208,146.30/x
  3. Step 3: Cross multiply
    657,398.58x = 986,245.65 × 208,146.30
  4. Step 4: Simplify right side
    657,398.58x = 205,283,382,938.60
  5. Step 5: Solve for x
    x = 205,283,382,938.60/657,398.58
  6. Step 6: Final answer
    x = 312,266.24

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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.