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Finding the Fourth Proportional to 347,645.60, 521,641.20 and 137,290.40

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Solution

The fourth proportional to 347,645.60, 521,641.20 and 137,290.40 is: 206,003.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,645.60 : 521,641.20 = 137,290.40 : x
  2. Step 2: Convert to fraction form
    347,645.60/521,641.20 = 137,290.40/x
  3. Step 3: Cross multiply
    347,645.60x = 521,641.20 × 137,290.40
  4. Step 4: Simplify right side
    347,645.60x = 71,616,329,004.48
  5. Step 5: Solve for x
    x = 71,616,329,004.48/347,645.60
  6. Step 6: Final answer
    x = 206,003.84

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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.