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Finding the Fourth Proportional to 999,443.76, 1,499,187.51 and 400,686.90

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Solution

The fourth proportional to 999,443.76, 1,499,187.51 and 400,686.90 is: 601,039.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,443.76 : 1,499,187.51 = 400,686.90 : x
  2. Step 2: Convert to fraction form
    999,443.76/1,499,187.51 = 400,686.90/x
  3. Step 3: Cross multiply
    999,443.76x = 1,499,187.51 × 400,686.90
  4. Step 4: Simplify right side
    999,443.76x = 600,704,795,900.62
  5. Step 5: Solve for x
    x = 600,704,795,900.62/999,443.76
  6. Step 6: Final answer
    x = 601,039.12

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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.