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Finding the Fourth Proportional to 638,809.40, 956,220.69 and 470,519.75

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Solution

The fourth proportional to 638,809.40, 956,220.69 and 470,519.75 is: 704,311.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,809.40 : 956,220.69 = 470,519.75 : x
  2. Step 2: Convert to fraction form
    638,809.40/956,220.69 = 470,519.75/x
  3. Step 3: Cross multiply
    638,809.40x = 956,220.69 × 470,519.75
  4. Step 4: Simplify right side
    638,809.40x = 449,920,720,003.63
  5. Step 5: Solve for x
    x = 449,920,720,003.63/638,809.40
  6. Step 6: Final answer
    x = 704,311.36

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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.