Home / 661,623.36-912,719.52-393,161.28

Finding the Fourth Proportional to 661,623.36, 912,719.52 and 393,161.28

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Solution

The fourth proportional to 661,623.36, 912,719.52 and 393,161.28 is: 542,371.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,623.36 : 912,719.52 = 393,161.28 : x
  2. Step 2: Convert to fraction form
    661,623.36/912,719.52 = 393,161.28/x
  3. Step 3: Cross multiply
    661,623.36x = 912,719.52 × 393,161.28
  4. Step 4: Simplify right side
    661,623.36x = 358,845,974,764.19
  5. Step 5: Solve for x
    x = 358,845,974,764.19/661,623.36
  6. Step 6: Final answer
    x = 542,371.98

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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.