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Finding the Fourth Proportional to 507,220.53, 699,985.44 and 280,866.03

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Solution

The fourth proportional to 507,220.53, 699,985.44 and 280,866.03 is: 387,606.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,220.53 : 699,985.44 = 280,866.03 : x
  2. Step 2: Convert to fraction form
    507,220.53/699,985.44 = 280,866.03/x
  3. Step 3: Cross multiply
    507,220.53x = 699,985.44 × 280,866.03
  4. Step 4: Simplify right side
    507,220.53x = 196,602,131,590.60
  5. Step 5: Solve for x
    x = 196,602,131,590.60/507,220.53
  6. Step 6: Final answer
    x = 387,606.81

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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.