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Finding the Fourth Proportional to 347,999.40, 521,577.90 and 147,899.70

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Solution

The fourth proportional to 347,999.40, 521,577.90 and 147,899.70 is: 221,670.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,999.40 : 521,577.90 = 147,899.70 : x
  2. Step 2: Convert to fraction form
    347,999.40/521,577.90 = 147,899.70/x
  3. Step 3: Cross multiply
    347,999.40x = 521,577.90 × 147,899.70
  4. Step 4: Simplify right side
    347,999.40x = 77,141,214,936.63
  5. Step 5: Solve for x
    x = 77,141,214,936.63/347,999.40
  6. Step 6: Final answer
    x = 221,670.54

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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.