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Finding the Fourth Proportional to 515,145.69, 773,013.38 and 402,510.33

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Solution

The fourth proportional to 515,145.69, 773,013.38 and 402,510.33 is: 603,995.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,145.69 : 773,013.38 = 402,510.33 : x
  2. Step 2: Convert to fraction form
    515,145.69/773,013.38 = 402,510.33/x
  3. Step 3: Cross multiply
    515,145.69x = 773,013.38 × 402,510.33
  4. Step 4: Simplify right side
    515,145.69x = 311,145,868,665.66
  5. Step 5: Solve for x
    x = 311,145,868,665.66/515,145.69
  6. Step 6: Final answer
    x = 603,995.87

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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.