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Finding the Fourth Proportional to 561,816.54, 775,314.18 and 307,168.02

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Solution

The fourth proportional to 561,816.54, 775,314.18 and 307,168.02 is: 423,895.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,816.54 : 775,314.18 = 307,168.02 : x
  2. Step 2: Convert to fraction form
    561,816.54/775,314.18 = 307,168.02/x
  3. Step 3: Cross multiply
    561,816.54x = 775,314.18 × 307,168.02
  4. Step 4: Simplify right side
    561,816.54x = 238,151,721,548.52
  5. Step 5: Solve for x
    x = 238,151,721,548.52/561,816.54
  6. Step 6: Final answer
    x = 423,895.89

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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.