Home / 1,345,688.40-2,018,921.40-399,081.90

Finding the Fourth Proportional to 1,345,688.40, 2,018,921.40 and 399,081.90

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Solution

The fourth proportional to 1,345,688.40, 2,018,921.40 and 399,081.90 is: 598,738.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345,688.40 : 2,018,921.40 = 399,081.90 : x
  2. Step 2: Convert to fraction form
    1,345,688.40/2,018,921.40 = 399,081.90/x
  3. Step 3: Cross multiply
    1,345,688.40x = 2,018,921.40 × 399,081.90
  4. Step 4: Simplify right side
    1,345,688.40x = 805,714,988,262.66
  5. Step 5: Solve for x
    x = 805,714,988,262.66/1,345,688.40
  6. Step 6: Final answer
    x = 598,738.15

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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.