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Finding the Fourth Proportional to 262,339.60, 393,412.20 and 84,852.40

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Solution

The fourth proportional to 262,339.60, 393,412.20 and 84,852.40 is: 127,247.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,339.60 : 393,412.20 = 84,852.40 : x
  2. Step 2: Convert to fraction form
    262,339.60/393,412.20 = 84,852.40/x
  3. Step 3: Cross multiply
    262,339.60x = 393,412.20 × 84,852.40
  4. Step 4: Simplify right side
    262,339.60x = 33,381,969,359.28
  5. Step 5: Solve for x
    x = 33,381,969,359.28/262,339.60
  6. Step 6: Final answer
    x = 127,247.16

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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.