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Finding the Fourth Proportional to 439,208.50, 658,812.75 and 139,689.70

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Solution

The fourth proportional to 439,208.50, 658,812.75 and 139,689.70 is: 209,534.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,208.50 : 658,812.75 = 139,689.70 : x
  2. Step 2: Convert to fraction form
    439,208.50/658,812.75 = 139,689.70/x
  3. Step 3: Cross multiply
    439,208.50x = 658,812.75 × 139,689.70
  4. Step 4: Simplify right side
    439,208.50x = 92,029,355,403.68
  5. Step 5: Solve for x
    x = 92,029,355,403.68/439,208.50
  6. Step 6: Final answer
    x = 209,534.55

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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.