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Finding the Fourth Proportional to 619,858.40, 929,363.12 and 315,663.72

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Solution

The fourth proportional to 619,858.40, 929,363.12 and 315,663.72 is: 473,279.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,858.40 : 929,363.12 = 315,663.72 : x
  2. Step 2: Convert to fraction form
    619,858.40/929,363.12 = 315,663.72/x
  3. Step 3: Cross multiply
    619,858.40x = 929,363.12 × 315,663.72
  4. Step 4: Simplify right side
    619,858.40x = 293,366,219,690.01
  5. Step 5: Solve for x
    x = 293,366,219,690.01/619,858.40
  6. Step 6: Final answer
    x = 473,279.41

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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.