Home / 769,386.37-1,153,456.66-320,443.28

Finding the Fourth Proportional to 769,386.37, 1,153,456.66 and 320,443.28

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Solution

The fourth proportional to 769,386.37, 1,153,456.66 and 320,443.28 is: 480,405.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,386.37 : 1,153,456.66 = 320,443.28 : x
  2. Step 2: Convert to fraction form
    769,386.37/1,153,456.66 = 320,443.28/x
  3. Step 3: Cross multiply
    769,386.37x = 1,153,456.66 × 320,443.28
  4. Step 4: Simplify right side
    769,386.37x = 369,617,440,329.46
  5. Step 5: Solve for x
    x = 369,617,440,329.46/769,386.37
  6. Step 6: Final answer
    x = 480,405.49

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1.5x scale

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.