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Finding the Fourth Proportional to 528,186.06, 728,784.56 and 313,395.92

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Solution

The fourth proportional to 528,186.06, 728,784.56 and 313,395.92 is: 432,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,186.06 : 728,784.56 = 313,395.92 : x
  2. Step 2: Convert to fraction form
    528,186.06/728,784.56 = 313,395.92/x
  3. Step 3: Cross multiply
    528,186.06x = 728,784.56 × 313,395.92
  4. Step 4: Simplify right side
    528,186.06x = 228,398,107,663.00
  5. Step 5: Solve for x
    x = 228,398,107,663.00/528,186.06
  6. Step 6: Final answer
    x = 432,419.79

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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.