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Finding the Fourth Proportional to 425,903.45, 638,668.13 and 159,477.12

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Solution

The fourth proportional to 425,903.45, 638,668.13 and 159,477.12 is: 239,145.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,903.45 : 638,668.13 = 159,477.12 : x
  2. Step 2: Convert to fraction form
    425,903.45/638,668.13 = 159,477.12/x
  3. Step 3: Cross multiply
    425,903.45x = 638,668.13 × 159,477.12
  4. Step 4: Simplify right side
    425,903.45x = 101,852,953,210.80
  5. Step 5: Solve for x
    x = 101,852,953,210.80/425,903.45
  6. Step 6: Final answer
    x = 239,145.64

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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.