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Finding the Fourth Proportional to 347,813.70, 521,720.55 and 148,140.60

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Solution

The fourth proportional to 347,813.70, 521,720.55 and 148,140.60 is: 222,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,813.70 : 521,720.55 = 148,140.60 : x
  2. Step 2: Convert to fraction form
    347,813.70/521,720.55 = 148,140.60/x
  3. Step 3: Cross multiply
    347,813.70x = 521,720.55 × 148,140.60
  4. Step 4: Simplify right side
    347,813.70x = 77,287,995,309.33
  5. Step 5: Solve for x
    x = 77,287,995,309.33/347,813.70
  6. Step 6: Final answer
    x = 222,210.90

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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.