Home / 678,389.46-1,016,633.79-509,802

Finding the Fourth Proportional to 678,389.46, 1,016,633.79 and 509,802

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Solution

The fourth proportional to 678,389.46, 1,016,633.79 and 509,802 is: 763,988.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,389.46 : 1,016,633.79 = 509,802 : x
  2. Step 2: Convert to fraction form
    678,389.46/1,016,633.79 = 509,802/x
  3. Step 3: Cross multiply
    678,389.46x = 1,016,633.79 × 509,802
  4. Step 4: Simplify right side
    678,389.46x = 518,281,939,409.58
  5. Step 5: Solve for x
    x = 518,281,939,409.58/678,389.46
  6. Step 6: Final answer
    x = 763,988.79

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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.