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Finding the Fourth Proportional to 347,672.70, 521,509.05 and 147,999.60

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Solution

The fourth proportional to 347,672.70, 521,509.05 and 147,999.60 is: 221,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,672.70 : 521,509.05 = 147,999.60 : x
  2. Step 2: Convert to fraction form
    347,672.70/521,509.05 = 147,999.60/x
  3. Step 3: Cross multiply
    347,672.70x = 521,509.05 × 147,999.60
  4. Step 4: Simplify right side
    347,672.70x = 77,183,130,796.38
  5. Step 5: Solve for x
    x = 77,183,130,796.38/347,672.70
  6. Step 6: Final answer
    x = 221,999.40

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1.5x scale

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.