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Finding the Fourth Proportional to 425,555.36, 638,354.91 and 110,015

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Solution

The fourth proportional to 425,555.36, 638,354.91 and 110,015 is: 165,028.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,555.36 : 638,354.91 = 110,015 : x
  2. Step 2: Convert to fraction form
    425,555.36/638,354.91 = 110,015/x
  3. Step 3: Cross multiply
    425,555.36x = 638,354.91 × 110,015
  4. Step 4: Simplify right side
    425,555.36x = 70,228,615,423.65
  5. Step 5: Solve for x
    x = 70,228,615,423.65/425,555.36
  6. Step 6: Final answer
    x = 165,028.15

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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.