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Finding the Fourth Proportional to 768,908.50, 1,060,880.65 and 442,203.70

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Solution

The fourth proportional to 768,908.50, 1,060,880.65 and 442,203.70 is: 610,118.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,908.50 : 1,060,880.65 = 442,203.70 : x
  2. Step 2: Convert to fraction form
    768,908.50/1,060,880.65 = 442,203.70/x
  3. Step 3: Cross multiply
    768,908.50x = 1,060,880.65 × 442,203.70
  4. Step 4: Simplify right side
    768,908.50x = 469,125,348,688.41
  5. Step 5: Solve for x
    x = 469,125,348,688.41/768,908.50
  6. Step 6: Final answer
    x = 610,118.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.