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Finding the Fourth Proportional to 577,037.80, 865,401.18 and 391,191.40

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Solution

The fourth proportional to 577,037.80, 865,401.18 and 391,191.40 is: 586,681.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,037.80 : 865,401.18 = 391,191.40 : x
  2. Step 2: Convert to fraction form
    577,037.80/865,401.18 = 391,191.40/x
  3. Step 3: Cross multiply
    577,037.80x = 865,401.18 × 391,191.40
  4. Step 4: Simplify right side
    577,037.80x = 338,537,499,165.85
  5. Step 5: Solve for x
    x = 338,537,499,165.85/577,037.80
  6. Step 6: Final answer
    x = 586,681.67

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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.