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Finding the Fourth Proportional to 347,652.80, 521,090.40 and 147,939.20

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Solution

The fourth proportional to 347,652.80, 521,090.40 and 147,939.20 is: 221,743.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,652.80 : 521,090.40 = 147,939.20 : x
  2. Step 2: Convert to fraction form
    347,652.80/521,090.40 = 147,939.20/x
  3. Step 3: Cross multiply
    347,652.80x = 521,090.40 × 147,939.20
  4. Step 4: Simplify right side
    347,652.80x = 77,089,696,903.68
  5. Step 5: Solve for x
    x = 77,089,696,903.68/347,652.80
  6. Step 6: Final answer
    x = 221,743.35

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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.