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Finding the Fourth Proportional to 531,753.40, 795,686.10 and 391,785.40

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Solution

The fourth proportional to 531,753.40, 795,686.10 and 391,785.40 is: 586,245.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,753.40 : 795,686.10 = 391,785.40 : x
  2. Step 2: Convert to fraction form
    531,753.40/795,686.10 = 391,785.40/x
  3. Step 3: Cross multiply
    531,753.40x = 795,686.10 × 391,785.40
  4. Step 4: Simplify right side
    531,753.40x = 311,738,196,962.94
  5. Step 5: Solve for x
    x = 311,738,196,962.94/531,753.40
  6. Step 6: Final answer
    x = 586,245.80

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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.