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Finding the Fourth Proportional to 543,260.55, 815,013.84 and 290,407.81

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Solution

The fourth proportional to 543,260.55, 815,013.84 and 290,407.81 is: 435,677.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,260.55 : 815,013.84 = 290,407.81 : x
  2. Step 2: Convert to fraction form
    543,260.55/815,013.84 = 290,407.81/x
  3. Step 3: Cross multiply
    543,260.55x = 815,013.84 × 290,407.81
  4. Step 4: Simplify right side
    543,260.55x = 236,686,384,156.96
  5. Step 5: Solve for x
    x = 236,686,384,156.96/543,260.55
  6. Step 6: Final answer
    x = 435,677.48

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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.