Home / 778,978.70-1,168,986.45-442,018.70

Finding the Fourth Proportional to 778,978.70, 1,168,986.45 and 442,018.70

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Solution

The fourth proportional to 778,978.70, 1,168,986.45 and 442,018.70 is: 663,322.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,978.70 : 1,168,986.45 = 442,018.70 : x
  2. Step 2: Convert to fraction form
    778,978.70/1,168,986.45 = 442,018.70/x
  3. Step 3: Cross multiply
    778,978.70x = 1,168,986.45 × 442,018.70
  4. Step 4: Simplify right side
    778,978.70x = 516,713,870,946.62
  5. Step 5: Solve for x
    x = 516,713,870,946.62/778,978.70
  6. Step 6: Final answer
    x = 663,322.21

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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.