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Finding the Fourth Proportional to 309,785.07, 427,477.17 and 173,800.65

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Solution

The fourth proportional to 309,785.07, 427,477.17 and 173,800.65 is: 239,830.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,785.07 : 427,477.17 = 173,800.65 : x
  2. Step 2: Convert to fraction form
    309,785.07/427,477.17 = 173,800.65/x
  3. Step 3: Cross multiply
    309,785.07x = 427,477.17 × 173,800.65
  4. Step 4: Simplify right side
    309,785.07x = 74,295,810,006.16
  5. Step 5: Solve for x
    x = 74,295,810,006.16/309,785.07
  6. Step 6: Final answer
    x = 239,830.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.