Home / 778,960.80-1,167,980.40-405,712.80

Finding the Fourth Proportional to 778,960.80, 1,167,980.40 and 405,712.80

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Solution

The fourth proportional to 778,960.80, 1,167,980.40 and 405,712.80 is: 608,329.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,960.80 : 1,167,980.40 = 405,712.80 : x
  2. Step 2: Convert to fraction form
    778,960.80/1,167,980.40 = 405,712.80/x
  3. Step 3: Cross multiply
    778,960.80x = 1,167,980.40 × 405,712.80
  4. Step 4: Simplify right side
    778,960.80x = 473,864,598,429.12
  5. Step 5: Solve for x
    x = 473,864,598,429.12/778,960.80
  6. Step 6: Final answer
    x = 608,329.20

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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.