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Finding the Fourth Proportional to 528,254.50, 728,991.19 and 298,806.87

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Solution

The fourth proportional to 528,254.50, 728,991.19 and 298,806.87 is: 412,353.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,254.50 : 728,991.19 = 298,806.87 : x
  2. Step 2: Convert to fraction form
    528,254.50/728,991.19 = 298,806.87/x
  3. Step 3: Cross multiply
    528,254.50x = 728,991.19 × 298,806.87
  4. Step 4: Simplify right side
    528,254.50x = 217,827,578,848.70
  5. Step 5: Solve for x
    x = 217,827,578,848.70/528,254.50
  6. Step 6: Final answer
    x = 412,353.48

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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.