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Finding the Fourth Proportional to 262,140.20, 392,918.70 and 143,896.40

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Solution

The fourth proportional to 262,140.20, 392,918.70 and 143,896.40 is: 215,684.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,140.20 : 392,918.70 = 143,896.40 : x
  2. Step 2: Convert to fraction form
    262,140.20/392,918.70 = 143,896.40/x
  3. Step 3: Cross multiply
    262,140.20x = 392,918.70 × 143,896.40
  4. Step 4: Simplify right side
    262,140.20x = 56,539,586,422.68
  5. Step 5: Solve for x
    x = 56,539,586,422.68/262,140.20
  6. Step 6: Final answer
    x = 215,684.53

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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.