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Finding the Fourth Proportional to 308,841.21, 426,208.08 and 172,871.77

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Solution

The fourth proportional to 308,841.21, 426,208.08 and 172,871.77 is: 238,567.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,841.21 : 426,208.08 = 172,871.77 : x
  2. Step 2: Convert to fraction form
    308,841.21/426,208.08 = 172,871.77/x
  3. Step 3: Cross multiply
    308,841.21x = 426,208.08 × 172,871.77
  4. Step 4: Simplify right side
    308,841.21x = 73,679,345,177.90
  5. Step 5: Solve for x
    x = 73,679,345,177.90/308,841.21
  6. Step 6: Final answer
    x = 238,567.08

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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.