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Finding the Fourth Proportional to 349,563.60, 523,999.80 and 138,920.40

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Solution

The fourth proportional to 349,563.60, 523,999.80 and 138,920.40 is: 208,243.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,563.60 : 523,999.80 = 138,920.40 : x
  2. Step 2: Convert to fraction form
    349,563.60/523,999.80 = 138,920.40/x
  3. Step 3: Cross multiply
    349,563.60x = 523,999.80 × 138,920.40
  4. Step 4: Simplify right side
    349,563.60x = 72,794,261,815.92
  5. Step 5: Solve for x
    x = 72,794,261,815.92/349,563.60
  6. Step 6: Final answer
    x = 208,243.25

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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.