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Finding the Fourth Proportional to 371,399.80, 557,099.70 and 347,780.20

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Solution

The fourth proportional to 371,399.80, 557,099.70 and 347,780.20 is: 521,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,399.80 : 557,099.70 = 347,780.20 : x
  2. Step 2: Convert to fraction form
    371,399.80/557,099.70 = 347,780.20/x
  3. Step 3: Cross multiply
    371,399.80x = 557,099.70 × 347,780.20
  4. Step 4: Simplify right side
    371,399.80x = 193,748,245,085.94
  5. Step 5: Solve for x
    x = 193,748,245,085.94/371,399.80
  6. Step 6: Final answer
    x = 521,670.30

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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.