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Finding the Fourth Proportional to 437,539.60, 656,309.40 and 391,920.40

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Solution

The fourth proportional to 437,539.60, 656,309.40 and 391,920.40 is: 587,880.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,539.60 : 656,309.40 = 391,920.40 : x
  2. Step 2: Convert to fraction form
    437,539.60/656,309.40 = 391,920.40/x
  3. Step 3: Cross multiply
    437,539.60x = 656,309.40 × 391,920.40
  4. Step 4: Simplify right side
    437,539.60x = 257,221,042,571.76
  5. Step 5: Solve for x
    x = 257,221,042,571.76/437,539.60
  6. Step 6: Final answer
    x = 587,880.60

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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.