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Finding the Fourth Proportional to 358,807.50, 535,400.19 and 321,108.48

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Solution

The fourth proportional to 358,807.50, 535,400.19 and 321,108.48 is: 479,147.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,807.50 : 535,400.19 = 321,108.48 : x
  2. Step 2: Convert to fraction form
    358,807.50/535,400.19 = 321,108.48/x
  3. Step 3: Cross multiply
    358,807.50x = 535,400.19 × 321,108.48
  4. Step 4: Simplify right side
    358,807.50x = 171,921,541,202.61
  5. Step 5: Solve for x
    x = 171,921,541,202.61/358,807.50
  6. Step 6: Final answer
    x = 479,147.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.