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Finding the Fourth Proportional to 372,298.63, 558,503.30 and 172,639.20

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Solution

The fourth proportional to 372,298.63, 558,503.30 and 172,639.20 is: 258,984.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,298.63 : 558,503.30 = 172,639.20 : x
  2. Step 2: Convert to fraction form
    372,298.63/558,503.30 = 172,639.20/x
  3. Step 3: Cross multiply
    372,298.63x = 558,503.30 × 172,639.20
  4. Step 4: Simplify right side
    372,298.63x = 96,419,562,293.76
  5. Step 5: Solve for x
    x = 96,419,562,293.76/372,298.63
  6. Step 6: Final answer
    x = 258,984.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.