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Finding the Fourth Proportional to 619,341.40, 929,595.30 and 383,145.40

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Solution

The fourth proportional to 619,341.40, 929,595.30 and 383,145.40 is: 575,078.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,341.40 : 929,595.30 = 383,145.40 : x
  2. Step 2: Convert to fraction form
    619,341.40/929,595.30 = 383,145.40/x
  3. Step 3: Cross multiply
    619,341.40x = 929,595.30 × 383,145.40
  4. Step 4: Simplify right side
    619,341.40x = 356,170,163,056.62
  5. Step 5: Solve for x
    x = 356,170,163,056.62/619,341.40
  6. Step 6: Final answer
    x = 575,078.89

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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.