Home / 1,320,487.92-1,979,988.26-421,718.40

Finding the Fourth Proportional to 1,320,487.92, 1,979,988.26 and 421,718.40

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Solution

The fourth proportional to 1,320,487.92, 1,979,988.26 and 421,718.40 is: 632,340.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,487.92 : 1,979,988.26 = 421,718.40 : x
  2. Step 2: Convert to fraction form
    1,320,487.92/1,979,988.26 = 421,718.40/x
  3. Step 3: Cross multiply
    1,320,487.92x = 1,979,988.26 × 421,718.40
  4. Step 4: Simplify right side
    1,320,487.92x = 834,997,478,917.39
  5. Step 5: Solve for x
    x = 834,997,478,917.39/1,320,487.92
  6. Step 6: Final answer
    x = 632,340.11

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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.