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Finding the Fourth Proportional to 292,400.80, 437,629.20 and 212,210.80

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Solution

The fourth proportional to 292,400.80, 437,629.20 and 212,210.80 is: 317,610.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,400.80 : 437,629.20 = 212,210.80 : x
  2. Step 2: Convert to fraction form
    292,400.80/437,629.20 = 212,210.80/x
  3. Step 3: Cross multiply
    292,400.80x = 437,629.20 × 212,210.80
  4. Step 4: Simplify right side
    292,400.80x = 92,869,642,635.36
  5. Step 5: Solve for x
    x = 92,869,642,635.36/292,400.80
  6. Step 6: Final answer
    x = 317,610.77

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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.