Home / 1,392,145.20-2,086,835.40-642,884.40

Finding the Fourth Proportional to 1,392,145.20, 2,086,835.40 and 642,884.40

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Solution

The fourth proportional to 1,392,145.20, 2,086,835.40 and 642,884.40 is: 963,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,145.20 : 2,086,835.40 = 642,884.40 : x
  2. Step 2: Convert to fraction form
    1,392,145.20/2,086,835.40 = 642,884.40/x
  3. Step 3: Cross multiply
    1,392,145.20x = 2,086,835.40 × 642,884.40
  4. Step 4: Simplify right side
    1,392,145.20x = 1,341,593,924,027.76
  5. Step 5: Solve for x
    x = 1,341,593,924,027.76/1,392,145.20
  6. Step 6: Final answer
    x = 963,688.22

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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.