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Finding the Fourth Proportional to 286,756.72, 395,746.44 and 172,039.68

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Solution

The fourth proportional to 286,756.72, 395,746.44 and 172,039.68 is: 237,428.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,756.72 : 395,746.44 = 172,039.68 : x
  2. Step 2: Convert to fraction form
    286,756.72/395,746.44 = 172,039.68/x
  3. Step 3: Cross multiply
    286,756.72x = 395,746.44 × 172,039.68
  4. Step 4: Simplify right side
    286,756.72x = 68,084,090,898.74
  5. Step 5: Solve for x
    x = 68,084,090,898.74/286,756.72
  6. Step 6: Final answer
    x = 237,428.06

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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.