Home / 662,523.36-913,976.52-390,405.36

Finding the Fourth Proportional to 662,523.36, 913,976.52 and 390,405.36

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Solution

The fourth proportional to 662,523.36, 913,976.52 and 390,405.36 is: 538,579.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,523.36 : 913,976.52 = 390,405.36 : x
  2. Step 2: Convert to fraction form
    662,523.36/913,976.52 = 390,405.36/x
  3. Step 3: Cross multiply
    662,523.36x = 913,976.52 × 390,405.36
  4. Step 4: Simplify right side
    662,523.36x = 356,821,332,322.15
  5. Step 5: Solve for x
    x = 356,821,332,322.15/662,523.36
  6. Step 6: Final answer
    x = 538,579.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.