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Finding the Fourth Proportional to 526,616.40, 788,588.10 and 289,691.40

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Solution

The fourth proportional to 526,616.40, 788,588.10 and 289,691.40 is: 433,801.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,616.40 : 788,588.10 = 289,691.40 : x
  2. Step 2: Convert to fraction form
    526,616.40/788,588.10 = 289,691.40/x
  3. Step 3: Cross multiply
    526,616.40x = 788,588.10 × 289,691.40
  4. Step 4: Simplify right side
    526,616.40x = 228,447,190,712.34
  5. Step 5: Solve for x
    x = 228,447,190,712.34/526,616.40
  6. Step 6: Final answer
    x = 433,801.89

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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.