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Finding the Fourth Proportional to 270,493.40, 405,740.10 and 258,975.20

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Solution

The fourth proportional to 270,493.40, 405,740.10 and 258,975.20 is: 388,462.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,493.40 : 405,740.10 = 258,975.20 : x
  2. Step 2: Convert to fraction form
    270,493.40/405,740.10 = 258,975.20/x
  3. Step 3: Cross multiply
    270,493.40x = 405,740.10 × 258,975.20
  4. Step 4: Simplify right side
    270,493.40x = 105,076,623,545.52
  5. Step 5: Solve for x
    x = 105,076,623,545.52/270,493.40
  6. Step 6: Final answer
    x = 388,462.80

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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.