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Finding the Fourth Proportional to 309,389.64, 426,931.62 and 171,572.52

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Solution

The fourth proportional to 309,389.64, 426,931.62 and 171,572.52 is: 236,755.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,389.64 : 426,931.62 = 171,572.52 : x
  2. Step 2: Convert to fraction form
    309,389.64/426,931.62 = 171,572.52/x
  3. Step 3: Cross multiply
    309,389.64x = 426,931.62 × 171,572.52
  4. Step 4: Simplify right side
    309,389.64x = 73,249,733,911.08
  5. Step 5: Solve for x
    x = 73,249,733,911.08/309,389.64
  6. Step 6: Final answer
    x = 236,755.61

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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.