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Finding the Fourth Proportional to 315,388.80, 473,428.80 and 197,193.60

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Solution

The fourth proportional to 315,388.80, 473,428.80 and 197,193.60 is: 296,006.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,388.80 : 473,428.80 = 197,193.60 : x
  2. Step 2: Convert to fraction form
    315,388.80/473,428.80 = 197,193.60/x
  3. Step 3: Cross multiply
    315,388.80x = 473,428.80 × 197,193.60
  4. Step 4: Simplify right side
    315,388.80x = 93,357,129,415.68
  5. Step 5: Solve for x
    x = 93,357,129,415.68/315,388.80
  6. Step 6: Final answer
    x = 296,006.48

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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.