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Finding the Fourth Proportional to 862,400.70, 1,190,098.02 and 499,858.29

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Solution

The fourth proportional to 862,400.70, 1,190,098.02 and 499,858.29 is: 689,795.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,400.70 : 1,190,098.02 = 499,858.29 : x
  2. Step 2: Convert to fraction form
    862,400.70/1,190,098.02 = 499,858.29/x
  3. Step 3: Cross multiply
    862,400.70x = 1,190,098.02 × 499,858.29
  4. Step 4: Simplify right side
    862,400.70x = 594,880,361,209.59
  5. Step 5: Solve for x
    x = 594,880,361,209.59/862,400.70
  6. Step 6: Final answer
    x = 689,795.78

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1.5x scale

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.