Home / 743,990.28-1,026,786.87-421,665.78

Finding the Fourth Proportional to 743,990.28, 1,026,786.87 and 421,665.78

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Solution

The fourth proportional to 743,990.28, 1,026,786.87 and 421,665.78 is: 581,944.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,990.28 : 1,026,786.87 = 421,665.78 : x
  2. Step 2: Convert to fraction form
    743,990.28/1,026,786.87 = 421,665.78/x
  3. Step 3: Cross multiply
    743,990.28x = 1,026,786.87 × 421,665.78
  4. Step 4: Simplify right side
    743,990.28x = 432,960,886,432.31
  5. Step 5: Solve for x
    x = 432,960,886,432.31/743,990.28
  6. Step 6: Final answer
    x = 581,944.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.