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Finding the Fourth Proportional to 538,557.40, 807,836.10 and 257,930.20

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Solution

The fourth proportional to 538,557.40, 807,836.10 and 257,930.20 is: 386,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,557.40 : 807,836.10 = 257,930.20 : x
  2. Step 2: Convert to fraction form
    538,557.40/807,836.10 = 257,930.20/x
  3. Step 3: Cross multiply
    538,557.40x = 807,836.10 × 257,930.20
  4. Step 4: Simplify right side
    538,557.40x = 208,365,326,840.22
  5. Step 5: Solve for x
    x = 208,365,326,840.22/538,557.40
  6. Step 6: Final answer
    x = 386,895.30

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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.