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Finding the Fourth Proportional to 347,403.60, 521,278.20 and 137,048.40

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Solution

The fourth proportional to 347,403.60, 521,278.20 and 137,048.40 is: 205,640.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,403.60 : 521,278.20 = 137,048.40 : x
  2. Step 2: Convert to fraction form
    347,403.60/521,278.20 = 137,048.40/x
  3. Step 3: Cross multiply
    347,403.60x = 521,278.20 × 137,048.40
  4. Step 4: Simplify right side
    347,403.60x = 71,440,343,264.88
  5. Step 5: Solve for x
    x = 71,440,343,264.88/347,403.60
  6. Step 6: Final answer
    x = 205,640.77

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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.