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Finding the Fourth Proportional to 280,076.58, 386,395.65 and 172,459.98

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Solution

The fourth proportional to 280,076.58, 386,395.65 and 172,459.98 is: 237,927.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,076.58 : 386,395.65 = 172,459.98 : x
  2. Step 2: Convert to fraction form
    280,076.58/386,395.65 = 172,459.98/x
  3. Step 3: Cross multiply
    280,076.58x = 386,395.65 × 172,459.98
  4. Step 4: Simplify right side
    280,076.58x = 66,637,786,071.09
  5. Step 5: Solve for x
    x = 66,637,786,071.09/280,076.58
  6. Step 6: Final answer
    x = 237,927.02

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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.