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Finding the Fourth Proportional to 309,038.72, 426,453.14 and 173,041.50

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Solution

The fourth proportional to 309,038.72, 426,453.14 and 173,041.50 is: 238,785.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,038.72 : 426,453.14 = 173,041.50 : x
  2. Step 2: Convert to fraction form
    309,038.72/426,453.14 = 173,041.50/x
  3. Step 3: Cross multiply
    309,038.72x = 426,453.14 × 173,041.50
  4. Step 4: Simplify right side
    309,038.72x = 73,794,088,027.84
  5. Step 5: Solve for x
    x = 73,794,088,027.84/309,038.72
  6. Step 6: Final answer
    x = 238,785.90

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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.